Home / 42,915.92-64,360.60-20,715.44

Finding the Fourth Proportional to 42,915.92, 64,360.60 and 20,715.44

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Solution

The fourth proportional to 42,915.92, 64,360.60 and 20,715.44 is: 31,066.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,915.92 : 64,360.60 = 20,715.44 : x
  2. Step 2: Convert to fraction form
    42,915.92/64,360.60 = 20,715.44/x
  3. Step 3: Cross multiply
    42,915.92x = 64,360.60 × 20,715.44
  4. Step 4: Simplify right side
    42,915.92x = 1,333,258,147.66
  5. Step 5: Solve for x
    x = 1,333,258,147.66/42,915.92
  6. Step 6: Final answer
    x = 31,066.75

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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.