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Finding the Fourth Proportional to 21,314.08, 29,411.02 and 12,358.31

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Solution

The fourth proportional to 21,314.08, 29,411.02 and 12,358.31 is: 17,053.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.08 : 29,411.02 = 12,358.31 : x
  2. Step 2: Convert to fraction form
    21,314.08/29,411.02 = 12,358.31/x
  3. Step 3: Cross multiply
    21,314.08x = 29,411.02 × 12,358.31
  4. Step 4: Simplify right side
    21,314.08x = 363,470,545.21
  5. Step 5: Solve for x
    x = 363,470,545.21/21,314.08
  6. Step 6: Final answer
    x = 17,053.07

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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.