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Finding the Fourth Proportional to 13,062.90, 18,030.90 and 8,347.20

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Solution

The fourth proportional to 13,062.90, 18,030.90 and 8,347.20 is: 11,521.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,062.90 : 18,030.90 = 8,347.20 : x
  2. Step 2: Convert to fraction form
    13,062.90/18,030.90 = 8,347.20/x
  3. Step 3: Cross multiply
    13,062.90x = 18,030.90 × 8,347.20
  4. Step 4: Simplify right side
    13,062.90x = 150,507,528.48
  5. Step 5: Solve for x
    x = 150,507,528.48/13,062.90
  6. Step 6: Final answer
    x = 11,521.75

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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.