Home / 28,080,279.40-42,120,419.10-7,886,180.20

Finding the Fourth Proportional to 28,080,279.40, 42,120,419.10 and 7,886,180.20

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Solution

The fourth proportional to 28,080,279.40, 42,120,419.10 and 7,886,180.20 is: 11,829,270.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080,279.40 : 42,120,419.10 = 7,886,180.20 : x
  2. Step 2: Convert to fraction form
    28,080,279.40/42,120,419.10 = 7,886,180.20/x
  3. Step 3: Cross multiply
    28,080,279.40x = 42,120,419.10 × 7,886,180.20
  4. Step 4: Simplify right side
    28,080,279.40x = 332,169,215,122,121.81
  5. Step 5: Solve for x
    x = 332,169,215,122,121.81/28,080,279.40
  6. Step 6: Final answer
    x = 11,829,270.30

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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.