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Finding the Fourth Proportional to 12,607.74, 18,901.28 and 6,985.22

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Solution

The fourth proportional to 12,607.74, 18,901.28 and 6,985.22 is: 10,472.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,607.74 : 18,901.28 = 6,985.22 : x
  2. Step 2: Convert to fraction form
    12,607.74/18,901.28 = 6,985.22/x
  3. Step 3: Cross multiply
    12,607.74x = 18,901.28 × 6,985.22
  4. Step 4: Simplify right side
    12,607.74x = 132,029,599.08
  5. Step 5: Solve for x
    x = 132,029,599.08/12,607.74
  6. Step 6: Final answer
    x = 10,472.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.