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Finding the Fourth Proportional to 5,431.61, 7,491.76 and 4,984.92

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Solution

The fourth proportional to 5,431.61, 7,491.76 and 4,984.92 is: 6,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.61 : 7,491.76 = 4,984.92 : x
  2. Step 2: Convert to fraction form
    5,431.61/7,491.76 = 4,984.92/x
  3. Step 3: Cross multiply
    5,431.61x = 7,491.76 × 4,984.92
  4. Step 4: Simplify right side
    5,431.61x = 37,345,830.53
  5. Step 5: Solve for x
    x = 37,345,830.53/5,431.61
  6. Step 6: Final answer
    x = 6,875.65

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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.