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Finding the Fourth Proportional to 15,708.74, 21,678.03 and 9,338.49

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Solution

The fourth proportional to 15,708.74, 21,678.03 and 9,338.49 is: 12,887.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.74 : 21,678.03 = 9,338.49 : x
  2. Step 2: Convert to fraction form
    15,708.74/21,678.03 = 9,338.49/x
  3. Step 3: Cross multiply
    15,708.74x = 21,678.03 × 9,338.49
  4. Step 4: Simplify right side
    15,708.74x = 202,440,066.37
  5. Step 5: Solve for x
    x = 202,440,066.37/15,708.74
  6. Step 6: Final answer
    x = 12,887.10

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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.