Home / 13,557.91-18,707.70-8,518.57

Finding the Fourth Proportional to 13,557.91, 18,707.70 and 8,518.57

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Solution

The fourth proportional to 13,557.91, 18,707.70 and 8,518.57 is: 11,754.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,557.91 : 18,707.70 = 8,518.57 : x
  2. Step 2: Convert to fraction form
    13,557.91/18,707.70 = 8,518.57/x
  3. Step 3: Cross multiply
    13,557.91x = 18,707.70 × 8,518.57
  4. Step 4: Simplify right side
    13,557.91x = 159,362,747.67
  5. Step 5: Solve for x
    x = 159,362,747.67/13,557.91
  6. Step 6: Final answer
    x = 11,754.22

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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.