Home / 15,495.95-21,384.92-9,121.38

Finding the Fourth Proportional to 15,495.95, 21,384.92 and 9,121.38

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Solution

The fourth proportional to 15,495.95, 21,384.92 and 9,121.38 is: 12,587.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.95 : 21,384.92 = 9,121.38 : x
  2. Step 2: Convert to fraction form
    15,495.95/21,384.92 = 9,121.38/x
  3. Step 3: Cross multiply
    15,495.95x = 21,384.92 × 9,121.38
  4. Step 4: Simplify right side
    15,495.95x = 195,059,935.98
  5. Step 5: Solve for x
    x = 195,059,935.98/15,495.95
  6. Step 6: Final answer
    x = 12,587.81

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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.