Home / 27,981.12-42,000.86-12,409.68

Finding the Fourth Proportional to 27,981.12, 42,000.86 and 12,409.68

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Solution

The fourth proportional to 27,981.12, 42,000.86 and 12,409.68 is: 18,627.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,981.12 : 42,000.86 = 12,409.68 : x
  2. Step 2: Convert to fraction form
    27,981.12/42,000.86 = 12,409.68/x
  3. Step 3: Cross multiply
    27,981.12x = 42,000.86 × 12,409.68
  4. Step 4: Simplify right side
    27,981.12x = 521,217,232.32
  5. Step 5: Solve for x
    x = 521,217,232.32/27,981.12
  6. Step 6: Final answer
    x = 18,627.46

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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.