Home / 12,459,320.80-18,651,656.40-7,408,031.20

Finding the Fourth Proportional to 12,459,320.80, 18,651,656.40 and 7,408,031.20

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Solution

The fourth proportional to 12,459,320.80, 18,651,656.40 and 7,408,031.20 is: 11,089,854.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,459,320.80 : 18,651,656.40 = 7,408,031.20 : x
  2. Step 2: Convert to fraction form
    12,459,320.80/18,651,656.40 = 7,408,031.20/x
  3. Step 3: Cross multiply
    12,459,320.80x = 18,651,656.40 × 7,408,031.20
  4. Step 4: Simplify right side
    12,459,320.80x = 138,172,052,542,879.67
  5. Step 5: Solve for x
    x = 138,172,052,542,879.67/12,459,320.80
  6. Step 6: Final answer
    x = 11,089,854.32

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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.