Home / 20,853.57-28,777.65-11,422.14

Finding the Fourth Proportional to 20,853.57, 28,777.65 and 11,422.14

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Solution

The fourth proportional to 20,853.57, 28,777.65 and 11,422.14 is: 15,762.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.57 : 28,777.65 = 11,422.14 : x
  2. Step 2: Convert to fraction form
    20,853.57/28,777.65 = 11,422.14/x
  3. Step 3: Cross multiply
    20,853.57x = 28,777.65 × 11,422.14
  4. Step 4: Simplify right side
    20,853.57x = 328,702,347.17
  5. Step 5: Solve for x
    x = 328,702,347.17/20,853.57
  6. Step 6: Final answer
    x = 15,762.40

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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.