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Finding the Fourth Proportional to 13,107.92, 18,071.24 and 12,700.24

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Solution

The fourth proportional to 13,107.92, 18,071.24 and 12,700.24 is: 17,509.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.92 : 18,071.24 = 12,700.24 : x
  2. Step 2: Convert to fraction form
    13,107.92/18,071.24 = 12,700.24/x
  3. Step 3: Cross multiply
    13,107.92x = 18,071.24 × 12,700.24
  4. Step 4: Simplify right side
    13,107.92x = 229,509,085.10
  5. Step 5: Solve for x
    x = 229,509,085.10/13,107.92
  6. Step 6: Final answer
    x = 17,509.19

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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.