Home / 15,117.28-20,860.95-8,402.67

Finding the Fourth Proportional to 15,117.28, 20,860.95 and 8,402.67

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Solution

The fourth proportional to 15,117.28, 20,860.95 and 8,402.67 is: 11,595.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,117.28 : 20,860.95 = 8,402.67 : x
  2. Step 2: Convert to fraction form
    15,117.28/20,860.95 = 8,402.67/x
  3. Step 3: Cross multiply
    15,117.28x = 20,860.95 × 8,402.67
  4. Step 4: Simplify right side
    15,117.28x = 175,287,636.72
  5. Step 5: Solve for x
    x = 175,287,636.72/15,117.28
  6. Step 6: Final answer
    x = 11,595.19

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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.