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Finding the Fourth Proportional to 15,441, 21,308.98 and 9,389.22

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Solution

The fourth proportional to 15,441, 21,308.98 and 9,389.22 is: 12,957.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,441 : 21,308.98 = 9,389.22 : x
  2. Step 2: Convert to fraction form
    15,441/21,308.98 = 9,389.22/x
  3. Step 3: Cross multiply
    15,441x = 21,308.98 × 9,389.22
  4. Step 4: Simplify right side
    15,441x = 200,074,701.20
  5. Step 5: Solve for x
    x = 200,074,701.20/15,441
  6. Step 6: Final answer
    x = 12,957.37

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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.