Home / 18,695.18-25,779.50-11,981.10

Finding the Fourth Proportional to 18,695.18, 25,779.50 and 11,981.10

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Solution

The fourth proportional to 18,695.18, 25,779.50 and 11,981.10 is: 16,521.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.18 : 25,779.50 = 11,981.10 : x
  2. Step 2: Convert to fraction form
    18,695.18/25,779.50 = 11,981.10/x
  3. Step 3: Cross multiply
    18,695.18x = 25,779.50 × 11,981.10
  4. Step 4: Simplify right side
    18,695.18x = 308,866,767.45
  5. Step 5: Solve for x
    x = 308,866,767.45/18,695.18
  6. Step 6: Final answer
    x = 16,521.20

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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.