Home / 21,887.52-30,207-12,937.92

Finding the Fourth Proportional to 21,887.52, 30,207 and 12,937.92

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Solution

The fourth proportional to 21,887.52, 30,207 and 12,937.92 is: 17,855.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,887.52 : 30,207 = 12,937.92 : x
  2. Step 2: Convert to fraction form
    21,887.52/30,207 = 12,937.92/x
  3. Step 3: Cross multiply
    21,887.52x = 30,207 × 12,937.92
  4. Step 4: Simplify right side
    21,887.52x = 390,815,749.44
  5. Step 5: Solve for x
    x = 390,815,749.44/21,887.52
  6. Step 6: Final answer
    x = 17,855.64

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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.