Home / 15,370.91-21,211.63-8,656.61

Finding the Fourth Proportional to 15,370.91, 21,211.63 and 8,656.61

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Solution

The fourth proportional to 15,370.91, 21,211.63 and 8,656.61 is: 11,945.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,370.91 : 21,211.63 = 8,656.61 : x
  2. Step 2: Convert to fraction form
    15,370.91/21,211.63 = 8,656.61/x
  3. Step 3: Cross multiply
    15,370.91x = 21,211.63 × 8,656.61
  4. Step 4: Simplify right side
    15,370.91x = 183,620,808.37
  5. Step 5: Solve for x
    x = 183,620,808.37/15,370.91
  6. Step 6: Final answer
    x = 11,945.99

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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.