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Finding the Fourth Proportional to 21,468.59, 29,613.02 and 15,509.01

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Solution

The fourth proportional to 21,468.59, 29,613.02 and 15,509.01 is: 21,392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,468.59 : 29,613.02 = 15,509.01 : x
  2. Step 2: Convert to fraction form
    21,468.59/29,613.02 = 15,509.01/x
  3. Step 3: Cross multiply
    21,468.59x = 29,613.02 × 15,509.01
  4. Step 4: Simplify right side
    21,468.59x = 459,268,545.77
  5. Step 5: Solve for x
    x = 459,268,545.77/21,468.59
  6. Step 6: Final answer
    x = 21,392.59

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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.