Home / 20,507.15-28,296.45-11,430.55

Finding the Fourth Proportional to 20,507.15, 28,296.45 and 11,430.55

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Solution

The fourth proportional to 20,507.15, 28,296.45 and 11,430.55 is: 15,772.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.15 : 28,296.45 = 11,430.55 : x
  2. Step 2: Convert to fraction form
    20,507.15/28,296.45 = 11,430.55/x
  3. Step 3: Cross multiply
    20,507.15x = 28,296.45 × 11,430.55
  4. Step 4: Simplify right side
    20,507.15x = 323,443,986.55
  5. Step 5: Solve for x
    x = 323,443,986.55/20,507.15
  6. Step 6: Final answer
    x = 15,772.25

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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.