Home / 28,280-42,121.28-26,799.68

Finding the Fourth Proportional to 28,280, 42,121.28 and 26,799.68

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Solution

The fourth proportional to 28,280, 42,121.28 and 26,799.68 is: 39,916.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,280 : 42,121.28 = 26,799.68 : x
  2. Step 2: Convert to fraction form
    28,280/42,121.28 = 26,799.68/x
  3. Step 3: Cross multiply
    28,280x = 42,121.28 × 26,799.68
  4. Step 4: Simplify right side
    28,280x = 1,128,836,825.19
  5. Step 5: Solve for x
    x = 1,128,836,825.19/28,280
  6. Step 6: Final answer
    x = 39,916.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.