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Finding the Fourth Proportional to 15,763.32, 21,743.76 and 9,385.68

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Solution

The fourth proportional to 15,763.32, 21,743.76 and 9,385.68 is: 12,946.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,763.32 : 21,743.76 = 9,385.68 : x
  2. Step 2: Convert to fraction form
    15,763.32/21,743.76 = 9,385.68/x
  3. Step 3: Cross multiply
    15,763.32x = 21,743.76 × 9,385.68
  4. Step 4: Simplify right side
    15,763.32x = 204,079,973.36
  5. Step 5: Solve for x
    x = 204,079,973.36/15,763.32
  6. Step 6: Final answer
    x = 12,946.51

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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.