Home / 20,320.31-28,039.47-12,254.38

Finding the Fourth Proportional to 20,320.31, 28,039.47 and 12,254.38

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Solution

The fourth proportional to 20,320.31, 28,039.47 and 12,254.38 is: 16,909.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.31 : 28,039.47 = 12,254.38 : x
  2. Step 2: Convert to fraction form
    20,320.31/28,039.47 = 12,254.38/x
  3. Step 3: Cross multiply
    20,320.31x = 28,039.47 × 12,254.38
  4. Step 4: Simplify right side
    20,320.31x = 343,606,320.38
  5. Step 5: Solve for x
    x = 343,606,320.38/20,320.31
  6. Step 6: Final answer
    x = 16,909.50

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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.