Home / 13,408.76-19,971.50-12,706.20

Finding the Fourth Proportional to 13,408.76, 19,971.50 and 12,706.20

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Solution

The fourth proportional to 13,408.76, 19,971.50 and 12,706.20 is: 18,925.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.76 : 19,971.50 = 12,706.20 : x
  2. Step 2: Convert to fraction form
    13,408.76/19,971.50 = 12,706.20/x
  3. Step 3: Cross multiply
    13,408.76x = 19,971.50 × 12,706.20
  4. Step 4: Simplify right side
    13,408.76x = 253,761,873.30
  5. Step 5: Solve for x
    x = 253,761,873.30/13,408.76
  6. Step 6: Final answer
    x = 18,925.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.