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Finding the Fourth Proportional to 25,958.34, 38,939.40 and 9,320.40

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Solution

The fourth proportional to 25,958.34, 38,939.40 and 9,320.40 is: 13,981.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,958.34 : 38,939.40 = 9,320.40 : x
  2. Step 2: Convert to fraction form
    25,958.34/38,939.40 = 9,320.40/x
  3. Step 3: Cross multiply
    25,958.34x = 38,939.40 × 9,320.40
  4. Step 4: Simplify right side
    25,958.34x = 362,930,783.76
  5. Step 5: Solve for x
    x = 362,930,783.76/25,958.34
  6. Step 6: Final answer
    x = 13,981.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.