Home / 42,906.65-64,378.20-20,708.60

Finding the Fourth Proportional to 42,906.65, 64,378.20 and 20,708.60

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Solution

The fourth proportional to 42,906.65, 64,378.20 and 20,708.60 is: 31,071.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,906.65 : 64,378.20 = 20,708.60 : x
  2. Step 2: Convert to fraction form
    42,906.65/64,378.20 = 20,708.60/x
  3. Step 3: Cross multiply
    42,906.65x = 64,378.20 × 20,708.60
  4. Step 4: Simplify right side
    42,906.65x = 1,333,182,392.52
  5. Step 5: Solve for x
    x = 1,333,182,392.52/42,906.65
  6. Step 6: Final answer
    x = 31,071.70

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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.