Home / 15,191.11-20,939.86-10,402.77

Finding the Fourth Proportional to 15,191.11, 20,939.86 and 10,402.77

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Solution

The fourth proportional to 15,191.11, 20,939.86 and 10,402.77 is: 14,339.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,191.11 : 20,939.86 = 10,402.77 : x
  2. Step 2: Convert to fraction form
    15,191.11/20,939.86 = 10,402.77/x
  3. Step 3: Cross multiply
    15,191.11x = 20,939.86 × 10,402.77
  4. Step 4: Simplify right side
    15,191.11x = 217,832,547.41
  5. Step 5: Solve for x
    x = 217,832,547.41/15,191.11
  6. Step 6: Final answer
    x = 14,339.48

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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.