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Finding the Fourth Proportional to 13,077.60, 18,045 and 8,603.16

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Solution

The fourth proportional to 13,077.60, 18,045 and 8,603.16 is: 11,870.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,077.60 : 18,045 = 8,603.16 : x
  2. Step 2: Convert to fraction form
    13,077.60/18,045 = 8,603.16/x
  3. Step 3: Cross multiply
    13,077.60x = 18,045 × 8,603.16
  4. Step 4: Simplify right side
    13,077.60x = 155,244,022.20
  5. Step 5: Solve for x
    x = 155,244,022.20/13,077.60
  6. Step 6: Final answer
    x = 11,870.99

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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.