Home / 15,315.66-21,132.95-8,601.57

Finding the Fourth Proportional to 15,315.66, 21,132.95 and 8,601.57

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Solution

The fourth proportional to 15,315.66, 21,132.95 and 8,601.57 is: 11,868.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.66 : 21,132.95 = 8,601.57 : x
  2. Step 2: Convert to fraction form
    15,315.66/21,132.95 = 8,601.57/x
  3. Step 3: Cross multiply
    15,315.66x = 21,132.95 × 8,601.57
  4. Step 4: Simplify right side
    15,315.66x = 181,776,505.72
  5. Step 5: Solve for x
    x = 181,776,505.72/15,315.66
  6. Step 6: Final answer
    x = 11,868.67

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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.