Home / 15,013.81-20,718.76-8,299.72

Finding the Fourth Proportional to 15,013.81, 20,718.76 and 8,299.72

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Solution

The fourth proportional to 15,013.81, 20,718.76 and 8,299.72 is: 11,453.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.81 : 20,718.76 = 8,299.72 : x
  2. Step 2: Convert to fraction form
    15,013.81/20,718.76 = 8,299.72/x
  3. Step 3: Cross multiply
    15,013.81x = 20,718.76 × 8,299.72
  4. Step 4: Simplify right side
    15,013.81x = 171,959,911.90
  5. Step 5: Solve for x
    x = 171,959,911.90/15,013.81
  6. Step 6: Final answer
    x = 11,453.45

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1.5x scale

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.