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Finding the Fourth Proportional to 15,630.46, 21,570.63 and 8,917.18

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Solution

The fourth proportional to 15,630.46, 21,570.63 and 8,917.18 is: 12,306.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.46 : 21,570.63 = 8,917.18 : x
  2. Step 2: Convert to fraction form
    15,630.46/21,570.63 = 8,917.18/x
  3. Step 3: Cross multiply
    15,630.46x = 21,570.63 × 8,917.18
  4. Step 4: Simplify right side
    15,630.46x = 192,349,190.42
  5. Step 5: Solve for x
    x = 192,349,190.42/15,630.46
  6. Step 6: Final answer
    x = 12,306.05

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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.