Home / 20,945.61-28,881.29-15,270.35

Finding the Fourth Proportional to 20,945.61, 28,881.29 and 15,270.35

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Solution

The fourth proportional to 20,945.61, 28,881.29 and 15,270.35 is: 21,055.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,945.61 : 28,881.29 = 15,270.35 : x
  2. Step 2: Convert to fraction form
    20,945.61/28,881.29 = 15,270.35/x
  3. Step 3: Cross multiply
    20,945.61x = 28,881.29 × 15,270.35
  4. Step 4: Simplify right side
    20,945.61x = 441,027,300.52
  5. Step 5: Solve for x
    x = 441,027,300.52/20,945.61
  6. Step 6: Final answer
    x = 21,055.83

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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.