Home / 19,931.60-29,897.40-16,821.20

Finding the Fourth Proportional to 19,931.60, 29,897.40 and 16,821.20

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Solution

The fourth proportional to 19,931.60, 29,897.40 and 16,821.20 is: 25,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.60 : 29,897.40 = 16,821.20 : x
  2. Step 2: Convert to fraction form
    19,931.60/29,897.40 = 16,821.20/x
  3. Step 3: Cross multiply
    19,931.60x = 29,897.40 × 16,821.20
  4. Step 4: Simplify right side
    19,931.60x = 502,910,144.88
  5. Step 5: Solve for x
    x = 502,910,144.88/19,931.60
  6. Step 6: Final answer
    x = 25,231.80

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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.