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Finding the Fourth Proportional to 15,911.40, 22,246.80 and 15,911.40

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Solution

The fourth proportional to 15,911.40, 22,246.80 and 15,911.40 is: 22,246.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.40 : 22,246.80 = 15,911.40 : x
  2. Step 2: Convert to fraction form
    15,911.40/22,246.80 = 15,911.40/x
  3. Step 3: Cross multiply
    15,911.40x = 22,246.80 × 15,911.40
  4. Step 4: Simplify right side
    15,911.40x = 353,977,733.52
  5. Step 5: Solve for x
    x = 353,977,733.52/15,911.40
  6. Step 6: Final answer
    x = 22,246.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.