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Finding the Fourth Proportional to 28,182, 38,889.60 and 15,605.76

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Solution

The fourth proportional to 28,182, 38,889.60 and 15,605.76 is: 21,535.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,182 : 38,889.60 = 15,605.76 : x
  2. Step 2: Convert to fraction form
    28,182/38,889.60 = 15,605.76/x
  3. Step 3: Cross multiply
    28,182x = 38,889.60 × 15,605.76
  4. Step 4: Simplify right side
    28,182x = 606,901,764.10
  5. Step 5: Solve for x
    x = 606,901,764.10/28,182
  6. Step 6: Final answer
    x = 21,535.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.