Home / 7,220.10-9,962.28-4,389

Finding the Fourth Proportional to 7,220.10, 9,962.28 and 4,389

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Solution

The fourth proportional to 7,220.10, 9,962.28 and 4,389 is: 6,055.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.10 : 9,962.28 = 4,389 : x
  2. Step 2: Convert to fraction form
    7,220.10/9,962.28 = 4,389/x
  3. Step 3: Cross multiply
    7,220.10x = 9,962.28 × 4,389
  4. Step 4: Simplify right side
    7,220.10x = 43,724,446.92
  5. Step 5: Solve for x
    x = 43,724,446.92/7,220.10
  6. Step 6: Final answer
    x = 6,055.93

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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.