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Finding the Fourth Proportional to 7,061.48, 9,746 and 3,918.68

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Solution

The fourth proportional to 7,061.48, 9,746 and 3,918.68 is: 5,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,061.48 : 9,746 = 3,918.68 : x
  2. Step 2: Convert to fraction form
    7,061.48/9,746 = 3,918.68/x
  3. Step 3: Cross multiply
    7,061.48x = 9,746 × 3,918.68
  4. Step 4: Simplify right side
    7,061.48x = 38,191,455.28
  5. Step 5: Solve for x
    x = 38,191,455.28/7,061.48
  6. Step 6: Final answer
    x = 5,408.42

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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.