Home / 20,870.38-28,801.14-11,438.96

Finding the Fourth Proportional to 20,870.38, 28,801.14 and 11,438.96

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Solution

The fourth proportional to 20,870.38, 28,801.14 and 11,438.96 is: 15,785.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.38 : 28,801.14 = 11,438.96 : x
  2. Step 2: Convert to fraction form
    20,870.38/28,801.14 = 11,438.96/x
  3. Step 3: Cross multiply
    20,870.38x = 28,801.14 × 11,438.96
  4. Step 4: Simplify right side
    20,870.38x = 329,455,088.41
  5. Step 5: Solve for x
    x = 329,455,088.41/20,870.38
  6. Step 6: Final answer
    x = 15,785.77

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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.