Home / 20,988.12-31,482.14-14,394.31

Finding the Fourth Proportional to 20,988.12, 31,482.14 and 14,394.31

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Solution

The fourth proportional to 20,988.12, 31,482.14 and 14,394.31 is: 21,591.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.12 : 31,482.14 = 14,394.31 : x
  2. Step 2: Convert to fraction form
    20,988.12/31,482.14 = 14,394.31/x
  3. Step 3: Cross multiply
    20,988.12x = 31,482.14 × 14,394.31
  4. Step 4: Simplify right side
    20,988.12x = 453,163,730.97
  5. Step 5: Solve for x
    x = 453,163,730.97/20,988.12
  6. Step 6: Final answer
    x = 21,591.44

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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.