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Finding the Fourth Proportional to 13,715.20, 18,530.10 and 13,715.20

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Solution

The fourth proportional to 13,715.20, 18,530.10 and 13,715.20 is: 18,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.20 : 18,530.10 = 13,715.20 : x
  2. Step 2: Convert to fraction form
    13,715.20/18,530.10 = 13,715.20/x
  3. Step 3: Cross multiply
    13,715.20x = 18,530.10 × 13,715.20
  4. Step 4: Simplify right side
    13,715.20x = 254,144,027.52
  5. Step 5: Solve for x
    x = 254,144,027.52/13,715.20
  6. Step 6: Final answer
    x = 18,530.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.