Home / 21,399.40-29,530.02-13,439.08

Finding the Fourth Proportional to 21,399.40, 29,530.02 and 13,439.08

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Solution

The fourth proportional to 21,399.40, 29,530.02 and 13,439.08 is: 18,545.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.40 : 29,530.02 = 13,439.08 : x
  2. Step 2: Convert to fraction form
    21,399.40/29,530.02 = 13,439.08/x
  3. Step 3: Cross multiply
    21,399.40x = 29,530.02 × 13,439.08
  4. Step 4: Simplify right side
    21,399.40x = 396,856,301.18
  5. Step 5: Solve for x
    x = 396,856,301.18/21,399.40
  6. Step 6: Final answer
    x = 18,545.21

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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.