Home / 20,315.86-28,035.92-11,363.50

Finding the Fourth Proportional to 20,315.86, 28,035.92 and 11,363.50

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Solution

The fourth proportional to 20,315.86, 28,035.92 and 11,363.50 is: 15,681.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.86 : 28,035.92 = 11,363.50 : x
  2. Step 2: Convert to fraction form
    20,315.86/28,035.92 = 11,363.50/x
  3. Step 3: Cross multiply
    20,315.86x = 28,035.92 × 11,363.50
  4. Step 4: Simplify right side
    20,315.86x = 318,586,120.10
  5. Step 5: Solve for x
    x = 318,586,120.10/20,315.86
  6. Step 6: Final answer
    x = 15,681.65

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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.