Home / 13,577.98-18,729.30-8,978.76

Finding the Fourth Proportional to 13,577.98, 18,729.30 and 8,978.76

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Solution

The fourth proportional to 13,577.98, 18,729.30 and 8,978.76 is: 12,385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,577.98 : 18,729.30 = 8,978.76 : x
  2. Step 2: Convert to fraction form
    13,577.98/18,729.30 = 8,978.76/x
  3. Step 3: Cross multiply
    13,577.98x = 18,729.30 × 8,978.76
  4. Step 4: Simplify right side
    13,577.98x = 168,165,889.67
  5. Step 5: Solve for x
    x = 168,165,889.67/13,577.98
  6. Step 6: Final answer
    x = 12,385.19

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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.