Home / 20,979.95-31,483.20-19,009.59

Finding the Fourth Proportional to 20,979.95, 31,483.20 and 19,009.59

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Solution

The fourth proportional to 20,979.95, 31,483.20 and 19,009.59 is: 28,526.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.95 : 31,483.20 = 19,009.59 : x
  2. Step 2: Convert to fraction form
    20,979.95/31,483.20 = 19,009.59/x
  3. Step 3: Cross multiply
    20,979.95x = 31,483.20 × 19,009.59
  4. Step 4: Simplify right side
    20,979.95x = 598,482,723.89
  5. Step 5: Solve for x
    x = 598,482,723.89/20,979.95
  6. Step 6: Final answer
    x = 28,526.42

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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.