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Finding the Fourth Proportional to 8,711.52, 12,021.88 and 4,985.52

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Solution

The fourth proportional to 8,711.52, 12,021.88 and 4,985.52 is: 6,880.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.52 : 12,021.88 = 4,985.52 : x
  2. Step 2: Convert to fraction form
    8,711.52/12,021.88 = 4,985.52/x
  3. Step 3: Cross multiply
    8,711.52x = 12,021.88 × 4,985.52
  4. Step 4: Simplify right side
    8,711.52x = 59,935,323.18
  5. Step 5: Solve for x
    x = 59,935,323.18/8,711.52
  6. Step 6: Final answer
    x = 6,880.01

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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.