Home / 15,730.47-21,708.12-8,656.87

Finding the Fourth Proportional to 15,730.47, 21,708.12 and 8,656.87

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Solution

The fourth proportional to 15,730.47, 21,708.12 and 8,656.87 is: 11,946.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.47 : 21,708.12 = 8,656.87 : x
  2. Step 2: Convert to fraction form
    15,730.47/21,708.12 = 8,656.87/x
  3. Step 3: Cross multiply
    15,730.47x = 21,708.12 × 8,656.87
  4. Step 4: Simplify right side
    15,730.47x = 187,924,372.78
  5. Step 5: Solve for x
    x = 187,924,372.78/15,730.47
  6. Step 6: Final answer
    x = 11,946.52

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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.