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Finding the Fourth Proportional to 15,564.74, 21,478.47 and 8,849.42

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Solution

The fourth proportional to 15,564.74, 21,478.47 and 8,849.42 is: 12,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.74 : 21,478.47 = 8,849.42 : x
  2. Step 2: Convert to fraction form
    15,564.74/21,478.47 = 8,849.42/x
  3. Step 3: Cross multiply
    15,564.74x = 21,478.47 × 8,849.42
  4. Step 4: Simplify right side
    15,564.74x = 190,072,001.99
  5. Step 5: Solve for x
    x = 190,072,001.99/15,564.74
  6. Step 6: Final answer
    x = 12,211.70

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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.