Home / 13,124.40-18,111.70-7,819.30

Finding the Fourth Proportional to 13,124.40, 18,111.70 and 7,819.30

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Solution

The fourth proportional to 13,124.40, 18,111.70 and 7,819.30 is: 10,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.40 : 18,111.70 = 7,819.30 : x
  2. Step 2: Convert to fraction form
    13,124.40/18,111.70 = 7,819.30/x
  3. Step 3: Cross multiply
    13,124.40x = 18,111.70 × 7,819.30
  4. Step 4: Simplify right side
    13,124.40x = 141,620,815.81
  5. Step 5: Solve for x
    x = 141,620,815.81/13,124.40
  6. Step 6: Final answer
    x = 10,790.65

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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.