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Finding the Fourth Proportional to 10,718.72, 14,800.48 and 8,478.72

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Solution

The fourth proportional to 10,718.72, 14,800.48 and 8,478.72 is: 11,707.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,718.72 : 14,800.48 = 8,478.72 : x
  2. Step 2: Convert to fraction form
    10,718.72/14,800.48 = 8,478.72/x
  3. Step 3: Cross multiply
    10,718.72x = 14,800.48 × 8,478.72
  4. Step 4: Simplify right side
    10,718.72x = 125,489,125.79
  5. Step 5: Solve for x
    x = 125,489,125.79/10,718.72
  6. Step 6: Final answer
    x = 11,707.47

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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.