Home / 20,681.90-28,541.66-11,729.78

Finding the Fourth Proportional to 20,681.90, 28,541.66 and 11,729.78

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Solution

The fourth proportional to 20,681.90, 28,541.66 and 11,729.78 is: 16,187.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.90 : 28,541.66 = 11,729.78 : x
  2. Step 2: Convert to fraction form
    20,681.90/28,541.66 = 11,729.78/x
  3. Step 3: Cross multiply
    20,681.90x = 28,541.66 × 11,729.78
  4. Step 4: Simplify right side
    20,681.90x = 334,787,392.63
  5. Step 5: Solve for x
    x = 334,787,392.63/20,681.90
  6. Step 6: Final answer
    x = 16,187.46

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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.