Home / 20,386.28-28,114.66-13,208.92

Finding the Fourth Proportional to 20,386.28, 28,114.66 and 13,208.92

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Solution

The fourth proportional to 20,386.28, 28,114.66 and 13,208.92 is: 18,216.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.28 : 28,114.66 = 13,208.92 : x
  2. Step 2: Convert to fraction form
    20,386.28/28,114.66 = 13,208.92/x
  3. Step 3: Cross multiply
    20,386.28x = 28,114.66 × 13,208.92
  4. Step 4: Simplify right side
    20,386.28x = 371,364,294.77
  5. Step 5: Solve for x
    x = 371,364,294.77/20,386.28
  6. Step 6: Final answer
    x = 18,216.38

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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.