Home / 12,920,619.15-17,831,248.70-7,119,399.38

Finding the Fourth Proportional to 12,920,619.15, 17,831,248.70 and 7,119,399.38

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Solution

The fourth proportional to 12,920,619.15, 17,831,248.70 and 7,119,399.38 is: 9,825,208.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920,619.15 : 17,831,248.70 = 7,119,399.38 : x
  2. Step 2: Convert to fraction form
    12,920,619.15/17,831,248.70 = 7,119,399.38/x
  3. Step 3: Cross multiply
    12,920,619.15x = 17,831,248.70 × 7,119,399.38
  4. Step 4: Simplify right side
    12,920,619.15x = 126,947,780,814,652.56
  5. Step 5: Solve for x
    x = 126,947,780,814,652.56/12,920,619.15
  6. Step 6: Final answer
    x = 9,825,208.79

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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.