Home / 12,474,421.20-18,711,631.80-7,666,520.40

Finding the Fourth Proportional to 12,474,421.20, 18,711,631.80 and 7,666,520.40

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Solution

The fourth proportional to 12,474,421.20, 18,711,631.80 and 7,666,520.40 is: 11,499,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,474,421.20 : 18,711,631.80 = 7,666,520.40 : x
  2. Step 2: Convert to fraction form
    12,474,421.20/18,711,631.80 = 7,666,520.40/x
  3. Step 3: Cross multiply
    12,474,421.20x = 18,711,631.80 × 7,666,520.40
  4. Step 4: Simplify right side
    12,474,421.20x = 143,453,106,911,988.72
  5. Step 5: Solve for x
    x = 143,453,106,911,988.72/12,474,421.20
  6. Step 6: Final answer
    x = 11,499,780.60

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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.