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Finding the Fourth Proportional to 15,404.40, 23,117.40 and 9,871.20

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Solution

The fourth proportional to 15,404.40, 23,117.40 and 9,871.20 is: 14,813.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,404.40 : 23,117.40 = 9,871.20 : x
  2. Step 2: Convert to fraction form
    15,404.40/23,117.40 = 9,871.20/x
  3. Step 3: Cross multiply
    15,404.40x = 23,117.40 × 9,871.20
  4. Step 4: Simplify right side
    15,404.40x = 228,196,478.88
  5. Step 5: Solve for x
    x = 228,196,478.88/15,404.40
  6. Step 6: Final answer
    x = 14,813.72

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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.