Home / 15,231.09-21,019.95-8,516.58

Finding the Fourth Proportional to 15,231.09, 21,019.95 and 8,516.58

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Solution

The fourth proportional to 15,231.09, 21,019.95 and 8,516.58 is: 11,753.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,231.09 : 21,019.95 = 8,516.58 : x
  2. Step 2: Convert to fraction form
    15,231.09/21,019.95 = 8,516.58/x
  3. Step 3: Cross multiply
    15,231.09x = 21,019.95 × 8,516.58
  4. Step 4: Simplify right side
    15,231.09x = 179,018,085.77
  5. Step 5: Solve for x
    x = 179,018,085.77/15,231.09
  6. Step 6: Final answer
    x = 11,753.47

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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.