Home / 7,239.36-9,989.10-4,215.12

Finding the Fourth Proportional to 7,239.36, 9,989.10 and 4,215.12

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Solution

The fourth proportional to 7,239.36, 9,989.10 and 4,215.12 is: 5,816.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.36 : 9,989.10 = 4,215.12 : x
  2. Step 2: Convert to fraction form
    7,239.36/9,989.10 = 4,215.12/x
  3. Step 3: Cross multiply
    7,239.36x = 9,989.10 × 4,215.12
  4. Step 4: Simplify right side
    7,239.36x = 42,105,255.19
  5. Step 5: Solve for x
    x = 42,105,255.19/7,239.36
  6. Step 6: Final answer
    x = 5,816.16

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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.