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Finding the Fourth Proportional to 19,491.20, 26,897.60 and 10,659.20

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Solution

The fourth proportional to 19,491.20, 26,897.60 and 10,659.20 is: 14,709.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,491.20 : 26,897.60 = 10,659.20 : x
  2. Step 2: Convert to fraction form
    19,491.20/26,897.60 = 10,659.20/x
  3. Step 3: Cross multiply
    19,491.20x = 26,897.60 × 10,659.20
  4. Step 4: Simplify right side
    19,491.20x = 286,706,897.92
  5. Step 5: Solve for x
    x = 286,706,897.92/19,491.20
  6. Step 6: Final answer
    x = 14,709.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.