Home / 20,656.89-28,507.65-11,707.28

Finding the Fourth Proportional to 20,656.89, 28,507.65 and 11,707.28

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Solution

The fourth proportional to 20,656.89, 28,507.65 and 11,707.28 is: 16,156.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.89 : 28,507.65 = 11,707.28 : x
  2. Step 2: Convert to fraction form
    20,656.89/28,507.65 = 11,707.28/x
  3. Step 3: Cross multiply
    20,656.89x = 28,507.65 × 11,707.28
  4. Step 4: Simplify right side
    20,656.89x = 333,747,040.69
  5. Step 5: Solve for x
    x = 333,747,040.69/20,656.89
  6. Step 6: Final answer
    x = 16,156.69

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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.