Home / 13,217.69-18,225.12-8,971.49

Finding the Fourth Proportional to 13,217.69, 18,225.12 and 8,971.49

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Solution

The fourth proportional to 13,217.69, 18,225.12 and 8,971.49 is: 12,370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.69 : 18,225.12 = 8,971.49 : x
  2. Step 2: Convert to fraction form
    13,217.69/18,225.12 = 8,971.49/x
  3. Step 3: Cross multiply
    13,217.69x = 18,225.12 × 8,971.49
  4. Step 4: Simplify right side
    13,217.69x = 163,506,390.70
  5. Step 5: Solve for x
    x = 163,506,390.70/13,217.69
  6. Step 6: Final answer
    x = 12,370.27

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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.