Home / 28,004.10-42,006.15-21,005.70

Finding the Fourth Proportional to 28,004.10, 42,006.15 and 21,005.70

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Solution

The fourth proportional to 28,004.10, 42,006.15 and 21,005.70 is: 31,508.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.10 : 42,006.15 = 21,005.70 : x
  2. Step 2: Convert to fraction form
    28,004.10/42,006.15 = 21,005.70/x
  3. Step 3: Cross multiply
    28,004.10x = 42,006.15 × 21,005.70
  4. Step 4: Simplify right side
    28,004.10x = 882,368,585.06
  5. Step 5: Solve for x
    x = 882,368,585.06/28,004.10
  6. Step 6: Final answer
    x = 31,508.55

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Similar ratio
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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.