Home / 28,557.20-42,835.80-15,435.20

Finding the Fourth Proportional to 28,557.20, 42,835.80 and 15,435.20

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Solution

The fourth proportional to 28,557.20, 42,835.80 and 15,435.20 is: 23,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.20 : 42,835.80 = 15,435.20 : x
  2. Step 2: Convert to fraction form
    28,557.20/42,835.80 = 15,435.20/x
  3. Step 3: Cross multiply
    28,557.20x = 42,835.80 × 15,435.20
  4. Step 4: Simplify right side
    28,557.20x = 661,179,140.16
  5. Step 5: Solve for x
    x = 661,179,140.16/28,557.20
  6. Step 6: Final answer
    x = 23,152.80

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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.