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Finding the Fourth Proportional to 7,959.76, 10,981.18 and 5,437.80

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Solution

The fourth proportional to 7,959.76, 10,981.18 and 5,437.80 is: 7,501.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.76 : 10,981.18 = 5,437.80 : x
  2. Step 2: Convert to fraction form
    7,959.76/10,981.18 = 5,437.80/x
  3. Step 3: Cross multiply
    7,959.76x = 10,981.18 × 5,437.80
  4. Step 4: Simplify right side
    7,959.76x = 59,713,460.60
  5. Step 5: Solve for x
    x = 59,713,460.60/7,959.76
  6. Step 6: Final answer
    x = 7,501.92

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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.