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Finding the Fourth Proportional to 7,239.04, 9,990.34 and 4,407.89

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Solution

The fourth proportional to 7,239.04, 9,990.34 and 4,407.89 is: 6,083.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.04 : 9,990.34 = 4,407.89 : x
  2. Step 2: Convert to fraction form
    7,239.04/9,990.34 = 4,407.89/x
  3. Step 3: Cross multiply
    7,239.04x = 9,990.34 × 4,407.89
  4. Step 4: Simplify right side
    7,239.04x = 44,036,258.81
  5. Step 5: Solve for x
    x = 44,036,258.81/7,239.04
  6. Step 6: Final answer
    x = 6,083.16

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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.