Home / 18,667.60-25,747.05-12,689.19

Finding the Fourth Proportional to 18,667.60, 25,747.05 and 12,689.19

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Solution

The fourth proportional to 18,667.60, 25,747.05 and 12,689.19 is: 17,501.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.60 : 25,747.05 = 12,689.19 : x
  2. Step 2: Convert to fraction form
    18,667.60/25,747.05 = 12,689.19/x
  3. Step 3: Cross multiply
    18,667.60x = 25,747.05 × 12,689.19
  4. Step 4: Simplify right side
    18,667.60x = 326,709,080.65
  5. Step 5: Solve for x
    x = 326,709,080.65/18,667.60
  6. Step 6: Final answer
    x = 17,501.40

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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.