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Finding the Fourth Proportional to 19,321.40, 26,660.02 and 11,365.20

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Solution

The fourth proportional to 19,321.40, 26,660.02 and 11,365.20 is: 15,681.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,321.40 : 26,660.02 = 11,365.20 : x
  2. Step 2: Convert to fraction form
    19,321.40/26,660.02 = 11,365.20/x
  3. Step 3: Cross multiply
    19,321.40x = 26,660.02 × 11,365.20
  4. Step 4: Simplify right side
    19,321.40x = 302,996,459.30
  5. Step 5: Solve for x
    x = 302,996,459.30/19,321.40
  6. Step 6: Final answer
    x = 15,681.91

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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.