Home / 20,406.84-28,159.56-11,454.72

Finding the Fourth Proportional to 20,406.84, 28,159.56 and 11,454.72

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Solution

The fourth proportional to 20,406.84, 28,159.56 and 11,454.72 is: 15,806.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.84 : 28,159.56 = 11,454.72 : x
  2. Step 2: Convert to fraction form
    20,406.84/28,159.56 = 11,454.72/x
  3. Step 3: Cross multiply
    20,406.84x = 28,159.56 × 11,454.72
  4. Step 4: Simplify right side
    20,406.84x = 322,559,875.12
  5. Step 5: Solve for x
    x = 322,559,875.12/20,406.84
  6. Step 6: Final answer
    x = 15,806.46

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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.