Home / 20,405,643.12-28,126,966.91-13,788,165.67

Finding the Fourth Proportional to 20,405,643.12, 28,126,966.91 and 13,788,165.67

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Solution

The fourth proportional to 20,405,643.12, 28,126,966.91 and 13,788,165.67 is: 19,005,491.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405,643.12 : 28,126,966.91 = 13,788,165.67 : x
  2. Step 2: Convert to fraction form
    20,405,643.12/28,126,966.91 = 13,788,165.67/x
  3. Step 3: Cross multiply
    20,405,643.12x = 28,126,966.91 × 13,788,165.67
  4. Step 4: Simplify right side
    20,405,643.12x = 387,819,279,410,429.75
  5. Step 5: Solve for x
    x = 387,819,279,410,429.75/20,405,643.12
  6. Step 6: Final answer
    x = 19,005,491.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.