Home / 20,489.40-30,734.10-14,256.45

Finding the Fourth Proportional to 20,489.40, 30,734.10 and 14,256.45

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Solution

The fourth proportional to 20,489.40, 30,734.10 and 14,256.45 is: 21,384.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,489.40 : 30,734.10 = 14,256.45 : x
  2. Step 2: Convert to fraction form
    20,489.40/30,734.10 = 14,256.45/x
  3. Step 3: Cross multiply
    20,489.40x = 30,734.10 × 14,256.45
  4. Step 4: Simplify right side
    20,489.40x = 438,159,159.95
  5. Step 5: Solve for x
    x = 438,159,159.95/20,489.40
  6. Step 6: Final answer
    x = 21,384.68

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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.