Home / 40,815.40-61,255.86-21,099.70

Finding the Fourth Proportional to 40,815.40, 61,255.86 and 21,099.70

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Solution

The fourth proportional to 40,815.40, 61,255.86 and 21,099.70 is: 31,666.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,815.40 : 61,255.86 = 21,099.70 : x
  2. Step 2: Convert to fraction form
    40,815.40/61,255.86 = 21,099.70/x
  3. Step 3: Cross multiply
    40,815.40x = 61,255.86 × 21,099.70
  4. Step 4: Simplify right side
    40,815.40x = 1,292,480,269.24
  5. Step 5: Solve for x
    x = 1,292,480,269.24/40,815.40
  6. Step 6: Final answer
    x = 31,666.49

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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.