Home / 28,585.60-42,907.20-13,806.40

Finding the Fourth Proportional to 28,585.60, 42,907.20 and 13,806.40

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Solution

The fourth proportional to 28,585.60, 42,907.20 and 13,806.40 is: 20,723.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,585.60 : 42,907.20 = 13,806.40 : x
  2. Step 2: Convert to fraction form
    28,585.60/42,907.20 = 13,806.40/x
  3. Step 3: Cross multiply
    28,585.60x = 42,907.20 × 13,806.40
  4. Step 4: Simplify right side
    28,585.60x = 592,393,966.08
  5. Step 5: Solve for x
    x = 592,393,966.08/28,585.60
  6. Step 6: Final answer
    x = 20,723.51

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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.