Home / 5,389.17-7,440.75-4,128

Finding the Fourth Proportional to 5,389.17, 7,440.75 and 4,128

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Solution

The fourth proportional to 5,389.17, 7,440.75 and 4,128 is: 5,699.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.17 : 7,440.75 = 4,128 : x
  2. Step 2: Convert to fraction form
    5,389.17/7,440.75 = 4,128/x
  3. Step 3: Cross multiply
    5,389.17x = 7,440.75 × 4,128
  4. Step 4: Simplify right side
    5,389.17x = 30,715,416
  5. Step 5: Solve for x
    x = 30,715,416/5,389.17
  6. Step 6: Final answer
    x = 5,699.47

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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.