Home / 15,478.74-21,376.85-12,799.67

Finding the Fourth Proportional to 15,478.74, 21,376.85 and 12,799.67

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Solution

The fourth proportional to 15,478.74, 21,376.85 and 12,799.67 is: 17,676.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,478.74 : 21,376.85 = 12,799.67 : x
  2. Step 2: Convert to fraction form
    15,478.74/21,376.85 = 12,799.67/x
  3. Step 3: Cross multiply
    15,478.74x = 21,376.85 × 12,799.67
  4. Step 4: Simplify right side
    15,478.74x = 273,616,454.76
  5. Step 5: Solve for x
    x = 273,616,454.76/15,478.74
  6. Step 6: Final answer
    x = 17,676.92

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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.