Home / 42,643.60-63,965.40-20,445.55

Finding the Fourth Proportional to 42,643.60, 63,965.40 and 20,445.55

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Solution

The fourth proportional to 42,643.60, 63,965.40 and 20,445.55 is: 30,668.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,643.60 : 63,965.40 = 20,445.55 : x
  2. Step 2: Convert to fraction form
    42,643.60/63,965.40 = 20,445.55/x
  3. Step 3: Cross multiply
    42,643.60x = 63,965.40 × 20,445.55
  4. Step 4: Simplify right side
    42,643.60x = 1,307,807,783.97
  5. Step 5: Solve for x
    x = 1,307,807,783.97/42,643.60
  6. Step 6: Final answer
    x = 30,668.33

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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.