Home / 28,257.91-42,386.88-20,515.93

Finding the Fourth Proportional to 28,257.91, 42,386.88 and 20,515.93

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Solution

The fourth proportional to 28,257.91, 42,386.88 and 20,515.93 is: 30,773.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.91 : 42,386.88 = 20,515.93 : x
  2. Step 2: Convert to fraction form
    28,257.91/42,386.88 = 20,515.93/x
  3. Step 3: Cross multiply
    28,257.91x = 42,386.88 × 20,515.93
  4. Step 4: Simplify right side
    28,257.91x = 869,606,263.00
  5. Step 5: Solve for x
    x = 869,606,263.00/28,257.91
  6. Step 6: Final answer
    x = 30,773.91

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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.