Home / 8,979,905.70-12,392,281.08-5,112,426.78

Finding the Fourth Proportional to 8,979,905.70, 12,392,281.08 and 5,112,426.78

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Solution

The fourth proportional to 8,979,905.70, 12,392,281.08 and 5,112,426.78 is: 7,055,155.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979,905.70 : 12,392,281.08 = 5,112,426.78 : x
  2. Step 2: Convert to fraction form
    8,979,905.70/12,392,281.08 = 5,112,426.78/x
  3. Step 3: Cross multiply
    8,979,905.70x = 12,392,281.08 × 5,112,426.78
  4. Step 4: Simplify right side
    8,979,905.70x = 63,354,629,658,679.33
  5. Step 5: Solve for x
    x = 63,354,629,658,679.33/8,979,905.70
  6. Step 6: Final answer
    x = 7,055,155.34

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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.