Home / 5,160.08-7,120.80-2,802.20

Finding the Fourth Proportional to 5,160.08, 7,120.80 and 2,802.20

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Solution

The fourth proportional to 5,160.08, 7,120.80 and 2,802.20 is: 3,866.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.08 : 7,120.80 = 2,802.20 : x
  2. Step 2: Convert to fraction form
    5,160.08/7,120.80 = 2,802.20/x
  3. Step 3: Cross multiply
    5,160.08x = 7,120.80 × 2,802.20
  4. Step 4: Simplify right side
    5,160.08x = 19,953,905.76
  5. Step 5: Solve for x
    x = 19,953,905.76/5,160.08
  6. Step 6: Final answer
    x = 3,866.98

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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.