Home / 15,730.84-21,708.57-8,657.11

Finding the Fourth Proportional to 15,730.84, 21,708.57 and 8,657.11

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Solution

The fourth proportional to 15,730.84, 21,708.57 and 8,657.11 is: 11,946.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.84 : 21,708.57 = 8,657.11 : x
  2. Step 2: Convert to fraction form
    15,730.84/21,708.57 = 8,657.11/x
  3. Step 3: Cross multiply
    15,730.84x = 21,708.57 × 8,657.11
  4. Step 4: Simplify right side
    15,730.84x = 187,933,478.43
  5. Step 5: Solve for x
    x = 187,933,478.43/15,730.84
  6. Step 6: Final answer
    x = 11,946.82

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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.