Home / 27,129.61-40,756.79-19,142.76

Finding the Fourth Proportional to 27,129.61, 40,756.79 and 19,142.76

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Solution

The fourth proportional to 27,129.61, 40,756.79 and 19,142.76 is: 28,758.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,129.61 : 40,756.79 = 19,142.76 : x
  2. Step 2: Convert to fraction form
    27,129.61/40,756.79 = 19,142.76/x
  3. Step 3: Cross multiply
    27,129.61x = 40,756.79 × 19,142.76
  4. Step 4: Simplify right side
    27,129.61x = 780,197,650.04
  5. Step 5: Solve for x
    x = 780,197,650.04/27,129.61
  6. Step 6: Final answer
    x = 28,758.16

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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.