Home / 20,345.49-28,077.78-11,393.01

Finding the Fourth Proportional to 20,345.49, 28,077.78 and 11,393.01

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Solution

The fourth proportional to 20,345.49, 28,077.78 and 11,393.01 is: 15,722.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.49 : 28,077.78 = 11,393.01 : x
  2. Step 2: Convert to fraction form
    20,345.49/28,077.78 = 11,393.01/x
  3. Step 3: Cross multiply
    20,345.49x = 28,077.78 × 11,393.01
  4. Step 4: Simplify right side
    20,345.49x = 319,890,428.32
  5. Step 5: Solve for x
    x = 319,890,428.32/20,345.49
  6. Step 6: Final answer
    x = 15,722.92

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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.