Home / 21,000.30-31,500.45-18,926.70

Finding the Fourth Proportional to 21,000.30, 31,500.45 and 18,926.70

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Solution

The fourth proportional to 21,000.30, 31,500.45 and 18,926.70 is: 28,390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.30 : 31,500.45 = 18,926.70 : x
  2. Step 2: Convert to fraction form
    21,000.30/31,500.45 = 18,926.70/x
  3. Step 3: Cross multiply
    21,000.30x = 31,500.45 × 18,926.70
  4. Step 4: Simplify right side
    21,000.30x = 596,199,567.02
  5. Step 5: Solve for x
    x = 596,199,567.02/21,000.30
  6. Step 6: Final answer
    x = 28,390.05

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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.