Home / 21,130.48-29,159.96-11,439.91

Finding the Fourth Proportional to 21,130.48, 29,159.96 and 11,439.91

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Solution

The fourth proportional to 21,130.48, 29,159.96 and 11,439.91 is: 15,787.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.48 : 29,159.96 = 11,439.91 : x
  2. Step 2: Convert to fraction form
    21,130.48/29,159.96 = 11,439.91/x
  3. Step 3: Cross multiply
    21,130.48x = 29,159.96 × 11,439.91
  4. Step 4: Simplify right side
    21,130.48x = 333,587,318.00
  5. Step 5: Solve for x
    x = 333,587,318.00/21,130.48
  6. Step 6: Final answer
    x = 15,787.02

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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.