Home / 13,779.40-19,013.88-9,312.88

Finding the Fourth Proportional to 13,779.40, 19,013.88 and 9,312.88

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Solution

The fourth proportional to 13,779.40, 19,013.88 and 9,312.88 is: 12,850.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.40 : 19,013.88 = 9,312.88 : x
  2. Step 2: Convert to fraction form
    13,779.40/19,013.88 = 9,312.88/x
  3. Step 3: Cross multiply
    13,779.40x = 19,013.88 × 9,312.88
  4. Step 4: Simplify right side
    13,779.40x = 177,073,982.77
  5. Step 5: Solve for x
    x = 177,073,982.77/13,779.40
  6. Step 6: Final answer
    x = 12,850.63

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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.