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Finding the Fourth Proportional to 25,842.60, 38,667.90 and 18,930.60

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Solution

The fourth proportional to 25,842.60, 38,667.90 and 18,930.60 is: 28,325.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,842.60 : 38,667.90 = 18,930.60 : x
  2. Step 2: Convert to fraction form
    25,842.60/38,667.90 = 18,930.60/x
  3. Step 3: Cross multiply
    25,842.60x = 38,667.90 × 18,930.60
  4. Step 4: Simplify right side
    25,842.60x = 732,006,547.74
  5. Step 5: Solve for x
    x = 732,006,547.74/25,842.60
  6. Step 6: Final answer
    x = 28,325.58

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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.