Home / 28,488.24-42,739.20-12,902.40

Finding the Fourth Proportional to 28,488.24, 42,739.20 and 12,902.40

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Solution

The fourth proportional to 28,488.24, 42,739.20 and 12,902.40 is: 19,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,488.24 : 42,739.20 = 12,902.40 : x
  2. Step 2: Convert to fraction form
    28,488.24/42,739.20 = 12,902.40/x
  3. Step 3: Cross multiply
    28,488.24x = 42,739.20 × 12,902.40
  4. Step 4: Simplify right side
    28,488.24x = 551,438,254.08
  5. Step 5: Solve for x
    x = 551,438,254.08/28,488.24
  6. Step 6: Final answer
    x = 19,356.70

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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.