Home / 13,090.52-18,064.65-7,122.21

Finding the Fourth Proportional to 13,090.52, 18,064.65 and 7,122.21

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Solution

The fourth proportional to 13,090.52, 18,064.65 and 7,122.21 is: 9,828.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.52 : 18,064.65 = 7,122.21 : x
  2. Step 2: Convert to fraction form
    13,090.52/18,064.65 = 7,122.21/x
  3. Step 3: Cross multiply
    13,090.52x = 18,064.65 × 7,122.21
  4. Step 4: Simplify right side
    13,090.52x = 128,660,231.36
  5. Step 5: Solve for x
    x = 128,660,231.36/13,090.52
  6. Step 6: Final answer
    x = 9,828.50

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Double scale
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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.