Home / 28,672.18-42,959.79-13,888.18

Finding the Fourth Proportional to 28,672.18, 42,959.79 and 13,888.18

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Solution

The fourth proportional to 28,672.18, 42,959.79 and 13,888.18 is: 20,808.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,672.18 : 42,959.79 = 13,888.18 : x
  2. Step 2: Convert to fraction form
    28,672.18/42,959.79 = 13,888.18/x
  3. Step 3: Cross multiply
    28,672.18x = 42,959.79 × 13,888.18
  4. Step 4: Simplify right side
    28,672.18x = 596,633,296.28
  5. Step 5: Solve for x
    x = 596,633,296.28/28,672.18
  6. Step 6: Final answer
    x = 20,808.79

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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.