Home / 13,278.63-19,915.30-8,520.72

Finding the Fourth Proportional to 13,278.63, 19,915.30 and 8,520.72

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Solution

The fourth proportional to 13,278.63, 19,915.30 and 8,520.72 is: 12,779.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.63 : 19,915.30 = 8,520.72 : x
  2. Step 2: Convert to fraction form
    13,278.63/19,915.30 = 8,520.72/x
  3. Step 3: Cross multiply
    13,278.63x = 19,915.30 × 8,520.72
  4. Step 4: Simplify right side
    13,278.63x = 169,692,552.84
  5. Step 5: Solve for x
    x = 169,692,552.84/13,278.63
  6. Step 6: Final answer
    x = 12,779.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.