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Finding the Fourth Proportional to 25,484.79, 38,209.74 and 12,980.61

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Solution

The fourth proportional to 25,484.79, 38,209.74 and 12,980.61 is: 19,462.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,484.79 : 38,209.74 = 12,980.61 : x
  2. Step 2: Convert to fraction form
    25,484.79/38,209.74 = 12,980.61/x
  3. Step 3: Cross multiply
    25,484.79x = 38,209.74 × 12,980.61
  4. Step 4: Simplify right side
    25,484.79x = 495,985,733.14
  5. Step 5: Solve for x
    x = 495,985,733.14/25,484.79
  6. Step 6: Final answer
    x = 19,462.03

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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.