Home / 15,715.57-21,706.05-12,104.89

Finding the Fourth Proportional to 15,715.57, 21,706.05 and 12,104.89

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Solution

The fourth proportional to 15,715.57, 21,706.05 and 12,104.89 is: 16,719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.57 : 21,706.05 = 12,104.89 : x
  2. Step 2: Convert to fraction form
    15,715.57/21,706.05 = 12,104.89/x
  3. Step 3: Cross multiply
    15,715.57x = 21,706.05 × 12,104.89
  4. Step 4: Simplify right side
    15,715.57x = 262,749,426.76
  5. Step 5: Solve for x
    x = 262,749,426.76/15,715.57
  6. Step 6: Final answer
    x = 16,719.05

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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.