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Finding the Fourth Proportional to 25,920.90, 38,890.71 and 9,056.40

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Solution

The fourth proportional to 25,920.90, 38,890.71 and 9,056.40 is: 13,587.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,920.90 : 38,890.71 = 9,056.40 : x
  2. Step 2: Convert to fraction form
    25,920.90/38,890.71 = 9,056.40/x
  3. Step 3: Cross multiply
    25,920.90x = 38,890.71 × 9,056.40
  4. Step 4: Simplify right side
    25,920.90x = 352,209,826.04
  5. Step 5: Solve for x
    x = 352,209,826.04/25,920.90
  6. Step 6: Final answer
    x = 13,587.87

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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.