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Finding the Fourth Proportional to 19,965.60, 29,908.80 and 17,503.20

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Solution

The fourth proportional to 19,965.60, 29,908.80 and 17,503.20 is: 26,220.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,965.60 : 29,908.80 = 17,503.20 : x
  2. Step 2: Convert to fraction form
    19,965.60/29,908.80 = 17,503.20/x
  3. Step 3: Cross multiply
    19,965.60x = 29,908.80 × 17,503.20
  4. Step 4: Simplify right side
    19,965.60x = 523,499,708.16
  5. Step 5: Solve for x
    x = 523,499,708.16/19,965.60
  6. Step 6: Final answer
    x = 26,220.08

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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.