Home / 20,937.40-28,886.46-12,976.72

Finding the Fourth Proportional to 20,937.40, 28,886.46 and 12,976.72

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Solution

The fourth proportional to 20,937.40, 28,886.46 and 12,976.72 is: 17,903.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.40 : 28,886.46 = 12,976.72 : x
  2. Step 2: Convert to fraction form
    20,937.40/28,886.46 = 12,976.72/x
  3. Step 3: Cross multiply
    20,937.40x = 28,886.46 × 12,976.72
  4. Step 4: Simplify right side
    20,937.40x = 374,851,503.21
  5. Step 5: Solve for x
    x = 374,851,503.21/20,937.40
  6. Step 6: Final answer
    x = 17,903.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.