Home / 12,408,005.20-18,612,007.80-9,219,359.20

Finding the Fourth Proportional to 12,408,005.20, 18,612,007.80 and 9,219,359.20

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Solution

The fourth proportional to 12,408,005.20, 18,612,007.80 and 9,219,359.20 is: 13,829,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408,005.20 : 18,612,007.80 = 9,219,359.20 : x
  2. Step 2: Convert to fraction form
    12,408,005.20/18,612,007.80 = 9,219,359.20/x
  3. Step 3: Cross multiply
    12,408,005.20x = 18,612,007.80 × 9,219,359.20
  4. Step 4: Simplify right side
    12,408,005.20x = 171,590,785,341,401.75
  5. Step 5: Solve for x
    x = 171,590,785,341,401.75/12,408,005.20
  6. Step 6: Final answer
    x = 13,829,038.80

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Similar ratio
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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.