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Finding the Fourth Proportional to 28,122, 38,809.17 and 15,547.56

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Solution

The fourth proportional to 28,122, 38,809.17 and 15,547.56 is: 21,456.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122 : 38,809.17 = 15,547.56 : x
  2. Step 2: Convert to fraction form
    28,122/38,809.17 = 15,547.56/x
  3. Step 3: Cross multiply
    28,122x = 38,809.17 × 15,547.56
  4. Step 4: Simplify right side
    28,122x = 603,387,899.13
  5. Step 5: Solve for x
    x = 603,387,899.13/28,122
  6. Step 6: Final answer
    x = 21,456.08

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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.