Home / 20,689.43-31,041.65-10,158.32

Finding the Fourth Proportional to 20,689.43, 31,041.65 and 10,158.32

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Solution

The fourth proportional to 20,689.43, 31,041.65 and 10,158.32 is: 15,241.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.43 : 31,041.65 = 10,158.32 : x
  2. Step 2: Convert to fraction form
    20,689.43/31,041.65 = 10,158.32/x
  3. Step 3: Cross multiply
    20,689.43x = 31,041.65 × 10,158.32
  4. Step 4: Simplify right side
    20,689.43x = 315,331,117.03
  5. Step 5: Solve for x
    x = 315,331,117.03/20,689.43
  6. Step 6: Final answer
    x = 15,241.17

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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.