Home / 20,995.19-28,951.13-16,215.90

Finding the Fourth Proportional to 20,995.19, 28,951.13 and 16,215.90

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Solution

The fourth proportional to 20,995.19, 28,951.13 and 16,215.90 is: 22,360.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.19 : 28,951.13 = 16,215.90 : x
  2. Step 2: Convert to fraction form
    20,995.19/28,951.13 = 16,215.90/x
  3. Step 3: Cross multiply
    20,995.19x = 28,951.13 × 16,215.90
  4. Step 4: Simplify right side
    20,995.19x = 469,468,547.89
  5. Step 5: Solve for x
    x = 469,468,547.89/20,995.19
  6. Step 6: Final answer
    x = 22,360.77

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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.