Home / 3,618.19-5,428-1,538.17

Finding the Fourth Proportional to 3,618.19, 5,428 and 1,538.17

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Solution

The fourth proportional to 3,618.19, 5,428 and 1,538.17 is: 2,307.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.19 : 5,428 = 1,538.17 : x
  2. Step 2: Convert to fraction form
    3,618.19/5,428 = 1,538.17/x
  3. Step 3: Cross multiply
    3,618.19x = 5,428 × 1,538.17
  4. Step 4: Simplify right side
    3,618.19x = 8,349,186.76
  5. Step 5: Solve for x
    x = 8,349,186.76/3,618.19
  6. Step 6: Final answer
    x = 2,307.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.