Home / 5,490-7,566.12-5,072.40

Finding the Fourth Proportional to 5,490, 7,566.12 and 5,072.40

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Solution

The fourth proportional to 5,490, 7,566.12 and 5,072.40 is: 6,990.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,490 : 7,566.12 = 5,072.40 : x
  2. Step 2: Convert to fraction form
    5,490/7,566.12 = 5,072.40/x
  3. Step 3: Cross multiply
    5,490x = 7,566.12 × 5,072.40
  4. Step 4: Simplify right side
    5,490x = 38,378,387.09
  5. Step 5: Solve for x
    x = 38,378,387.09/5,490
  6. Step 6: Final answer
    x = 6,990.60

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Double scale
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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.