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Finding the Fourth Proportional to 19,500.80, 29,258.40 and 18,780.80

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Solution

The fourth proportional to 19,500.80, 29,258.40 and 18,780.80 is: 28,178.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,500.80 : 29,258.40 = 18,780.80 : x
  2. Step 2: Convert to fraction form
    19,500.80/29,258.40 = 18,780.80/x
  3. Step 3: Cross multiply
    19,500.80x = 29,258.40 × 18,780.80
  4. Step 4: Simplify right side
    19,500.80x = 549,496,158.72
  5. Step 5: Solve for x
    x = 549,496,158.72/19,500.80
  6. Step 6: Final answer
    x = 28,178.13

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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.