Home / 19,920.32-29,870.28-11,152.88

Finding the Fourth Proportional to 19,920.32, 29,870.28 and 11,152.88

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Solution

The fourth proportional to 19,920.32, 29,870.28 and 11,152.88 is: 16,723.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.32 : 29,870.28 = 11,152.88 : x
  2. Step 2: Convert to fraction form
    19,920.32/29,870.28 = 11,152.88/x
  3. Step 3: Cross multiply
    19,920.32x = 29,870.28 × 11,152.88
  4. Step 4: Simplify right side
    19,920.32x = 333,139,648.41
  5. Step 5: Solve for x
    x = 333,139,648.41/19,920.32
  6. Step 6: Final answer
    x = 16,723.61

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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.