Home / 18,721,840.60-28,061,765.70-9,620,421.40

Finding the Fourth Proportional to 18,721,840.60, 28,061,765.70 and 9,620,421.40

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Solution

The fourth proportional to 18,721,840.60, 28,061,765.70 and 9,620,421.40 is: 14,419,843.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721,840.60 : 28,061,765.70 = 9,620,421.40 : x
  2. Step 2: Convert to fraction form
    18,721,840.60/28,061,765.70 = 9,620,421.40/x
  3. Step 3: Cross multiply
    18,721,840.60x = 28,061,765.70 × 9,620,421.40
  4. Step 4: Simplify right side
    18,721,840.60x = 269,966,011,262,065.97
  5. Step 5: Solve for x
    x = 269,966,011,262,065.97/18,721,840.60
  6. Step 6: Final answer
    x = 14,419,843.49

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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.