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Finding the Fourth Proportional to 10,587.70, 15,862.35 and 8,629.30

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Solution

The fourth proportional to 10,587.70, 15,862.35 and 8,629.30 is: 12,928.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,587.70 : 15,862.35 = 8,629.30 : x
  2. Step 2: Convert to fraction form
    10,587.70/15,862.35 = 8,629.30/x
  3. Step 3: Cross multiply
    10,587.70x = 15,862.35 × 8,629.30
  4. Step 4: Simplify right side
    10,587.70x = 136,880,976.86
  5. Step 5: Solve for x
    x = 136,880,976.86/10,587.70
  6. Step 6: Final answer
    x = 12,928.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.