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Finding the Fourth Proportional to 12,562.30, 18,811.05 and 9,970.30

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Solution

The fourth proportional to 12,562.30, 18,811.05 and 9,970.30 is: 14,929.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,562.30 : 18,811.05 = 9,970.30 : x
  2. Step 2: Convert to fraction form
    12,562.30/18,811.05 = 9,970.30/x
  3. Step 3: Cross multiply
    12,562.30x = 18,811.05 × 9,970.30
  4. Step 4: Simplify right side
    12,562.30x = 187,551,811.82
  5. Step 5: Solve for x
    x = 187,551,811.82/12,562.30
  6. Step 6: Final answer
    x = 14,929.74

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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.