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Finding the Fourth Proportional to 8,689.13, 12,970.10 and 7,464.41

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Solution

The fourth proportional to 8,689.13, 12,970.10 and 7,464.41 is: 11,141.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.13 : 12,970.10 = 7,464.41 : x
  2. Step 2: Convert to fraction form
    8,689.13/12,970.10 = 7,464.41/x
  3. Step 3: Cross multiply
    8,689.13x = 12,970.10 × 7,464.41
  4. Step 4: Simplify right side
    8,689.13x = 96,814,060.63
  5. Step 5: Solve for x
    x = 96,814,060.63/8,689.13
  6. Step 6: Final answer
    x = 11,141.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.