Home / 20,300.11-28,011.85-11,347.31

Finding the Fourth Proportional to 20,300.11, 28,011.85 and 11,347.31

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Solution

The fourth proportional to 20,300.11, 28,011.85 and 11,347.31 is: 15,658.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.11 : 28,011.85 = 11,347.31 : x
  2. Step 2: Convert to fraction form
    20,300.11/28,011.85 = 11,347.31/x
  3. Step 3: Cross multiply
    20,300.11x = 28,011.85 × 11,347.31
  4. Step 4: Simplify right side
    20,300.11x = 317,859,187.28
  5. Step 5: Solve for x
    x = 317,859,187.28/20,300.11
  6. Step 6: Final answer
    x = 15,658.01

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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.