Home / 15,730.49-21,708.02-8,656.90

Finding the Fourth Proportional to 15,730.49, 21,708.02 and 8,656.90

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Solution

The fourth proportional to 15,730.49, 21,708.02 and 8,656.90 is: 11,946.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.49 : 21,708.02 = 8,656.90 : x
  2. Step 2: Convert to fraction form
    15,730.49/21,708.02 = 8,656.90/x
  3. Step 3: Cross multiply
    15,730.49x = 21,708.02 × 8,656.90
  4. Step 4: Simplify right side
    15,730.49x = 187,924,207.12
  5. Step 5: Solve for x
    x = 187,924,207.12/15,730.49
  6. Step 6: Final answer
    x = 11,946.50

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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.