Home / 7,164.20-9,886.58-4,020.40

Finding the Fourth Proportional to 7,164.20, 9,886.58 and 4,020.40

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Solution

The fourth proportional to 7,164.20, 9,886.58 and 4,020.40 is: 5,548.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,164.20 : 9,886.58 = 4,020.40 : x
  2. Step 2: Convert to fraction form
    7,164.20/9,886.58 = 4,020.40/x
  3. Step 3: Cross multiply
    7,164.20x = 9,886.58 × 4,020.40
  4. Step 4: Simplify right side
    7,164.20x = 39,748,006.23
  5. Step 5: Solve for x
    x = 39,748,006.23/7,164.20
  6. Step 6: Final answer
    x = 5,548.14

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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.