Home / 18,786,873.61-28,139,820.67-12,688,068.66

Finding the Fourth Proportional to 18,786,873.61, 28,139,820.67 and 12,688,068.66

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Solution

The fourth proportional to 18,786,873.61, 28,139,820.67 and 12,688,068.66 is: 19,004,757.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,786,873.61 : 28,139,820.67 = 12,688,068.66 : x
  2. Step 2: Convert to fraction form
    18,786,873.61/28,139,820.67 = 12,688,068.66/x
  3. Step 3: Cross multiply
    18,786,873.61x = 28,139,820.67 × 12,688,068.66
  4. Step 4: Simplify right side
    18,786,873.61x = 357,039,976,741,047.25
  5. Step 5: Solve for x
    x = 357,039,976,741,047.25/18,786,873.61
  6. Step 6: Final answer
    x = 19,004,757.48

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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.