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Finding the Fourth Proportional to 7,139.04, 9,852.08 and 3,995.20

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Solution

The fourth proportional to 7,139.04, 9,852.08 and 3,995.20 is: 5,513.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.04 : 9,852.08 = 3,995.20 : x
  2. Step 2: Convert to fraction form
    7,139.04/9,852.08 = 3,995.20/x
  3. Step 3: Cross multiply
    7,139.04x = 9,852.08 × 3,995.20
  4. Step 4: Simplify right side
    7,139.04x = 39,361,030.02
  5. Step 5: Solve for x
    x = 39,361,030.02/7,139.04
  6. Step 6: Final answer
    x = 5,513.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.