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Finding the Fourth Proportional to 10,955.76, 15,117.48 and 6,479.76

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Solution

The fourth proportional to 10,955.76, 15,117.48 and 6,479.76 is: 8,941.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,955.76 : 15,117.48 = 6,479.76 : x
  2. Step 2: Convert to fraction form
    10,955.76/15,117.48 = 6,479.76/x
  3. Step 3: Cross multiply
    10,955.76x = 15,117.48 × 6,479.76
  4. Step 4: Simplify right side
    10,955.76x = 97,957,642.20
  5. Step 5: Solve for x
    x = 97,957,642.20/10,955.76
  6. Step 6: Final answer
    x = 8,941.20

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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.