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Finding the Fourth Proportional to 9,210, 12,709.80 and 5,018.25

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Solution

The fourth proportional to 9,210, 12,709.80 and 5,018.25 is: 6,925.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,210 : 12,709.80 = 5,018.25 : x
  2. Step 2: Convert to fraction form
    9,210/12,709.80 = 5,018.25/x
  3. Step 3: Cross multiply
    9,210x = 12,709.80 × 5,018.25
  4. Step 4: Simplify right side
    9,210x = 63,780,953.85
  5. Step 5: Solve for x
    x = 63,780,953.85/9,210
  6. Step 6: Final answer
    x = 6,925.19

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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.