Home / 28,549.10-39,398.81-15,629.28

Finding the Fourth Proportional to 28,549.10, 39,398.81 and 15,629.28

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Solution

The fourth proportional to 28,549.10, 39,398.81 and 15,629.28 is: 21,568.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,549.10 : 39,398.81 = 15,629.28 : x
  2. Step 2: Convert to fraction form
    28,549.10/39,398.81 = 15,629.28/x
  3. Step 3: Cross multiply
    28,549.10x = 39,398.81 × 15,629.28
  4. Step 4: Simplify right side
    28,549.10x = 615,774,758.02
  5. Step 5: Solve for x
    x = 615,774,758.02/28,549.10
  6. Step 6: Final answer
    x = 21,568.98

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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.