Home / 28,562.40-39,415.68-15,987.60

Finding the Fourth Proportional to 28,562.40, 39,415.68 and 15,987.60

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Solution

The fourth proportional to 28,562.40, 39,415.68 and 15,987.60 is: 22,062.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,562.40 : 39,415.68 = 15,987.60 : x
  2. Step 2: Convert to fraction form
    28,562.40/39,415.68 = 15,987.60/x
  3. Step 3: Cross multiply
    28,562.40x = 39,415.68 × 15,987.60
  4. Step 4: Simplify right side
    28,562.40x = 630,162,125.57
  5. Step 5: Solve for x
    x = 630,162,125.57/28,562.40
  6. Step 6: Final answer
    x = 22,062.65

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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.