Home / 15,316.16-21,135.47-8,600.72

Finding the Fourth Proportional to 15,316.16, 21,135.47 and 8,600.72

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Solution

The fourth proportional to 15,316.16, 21,135.47 and 8,600.72 is: 11,868.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.16 : 21,135.47 = 8,600.72 : x
  2. Step 2: Convert to fraction form
    15,316.16/21,135.47 = 8,600.72/x
  3. Step 3: Cross multiply
    15,316.16x = 21,135.47 × 8,600.72
  4. Step 4: Simplify right side
    15,316.16x = 181,780,110.86
  5. Step 5: Solve for x
    x = 181,780,110.86/15,316.16
  6. Step 6: Final answer
    x = 11,868.52

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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.