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Finding the Fourth Proportional to 15,630.54, 21,569.97 and 8,460.30

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Solution

The fourth proportional to 15,630.54, 21,569.97 and 8,460.30 is: 11,675.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.54 : 21,569.97 = 8,460.30 : x
  2. Step 2: Convert to fraction form
    15,630.54/21,569.97 = 8,460.30/x
  3. Step 3: Cross multiply
    15,630.54x = 21,569.97 × 8,460.30
  4. Step 4: Simplify right side
    15,630.54x = 182,488,417.19
  5. Step 5: Solve for x
    x = 182,488,417.19/15,630.54
  6. Step 6: Final answer
    x = 11,675.12

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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.