Home / 28,107.72-42,182.40-13,316.70

Finding the Fourth Proportional to 28,107.72, 42,182.40 and 13,316.70

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Solution

The fourth proportional to 28,107.72, 42,182.40 and 13,316.70 is: 19,984.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,107.72 : 42,182.40 = 13,316.70 : x
  2. Step 2: Convert to fraction form
    28,107.72/42,182.40 = 13,316.70/x
  3. Step 3: Cross multiply
    28,107.72x = 42,182.40 × 13,316.70
  4. Step 4: Simplify right side
    28,107.72x = 561,730,366.08
  5. Step 5: Solve for x
    x = 561,730,366.08/28,107.72
  6. Step 6: Final answer
    x = 19,984.91

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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.