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Finding the Fourth Proportional to 15,547.86, 21,456.63 and 8,834.63

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Solution

The fourth proportional to 15,547.86, 21,456.63 and 8,834.63 is: 12,192.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,547.86 : 21,456.63 = 8,834.63 : x
  2. Step 2: Convert to fraction form
    15,547.86/21,456.63 = 8,834.63/x
  3. Step 3: Cross multiply
    15,547.86x = 21,456.63 × 8,834.63
  4. Step 4: Simplify right side
    15,547.86x = 189,561,387.10
  5. Step 5: Solve for x
    x = 189,561,387.10/15,547.86
  6. Step 6: Final answer
    x = 12,192.12

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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.