Home / 28,429.64-39,233.12-15,683.28

Finding the Fourth Proportional to 28,429.64, 39,233.12 and 15,683.28

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Solution

The fourth proportional to 28,429.64, 39,233.12 and 15,683.28 is: 21,643.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,429.64 : 39,233.12 = 15,683.28 : x
  2. Step 2: Convert to fraction form
    28,429.64/39,233.12 = 15,683.28/x
  3. Step 3: Cross multiply
    28,429.64x = 39,233.12 × 15,683.28
  4. Step 4: Simplify right side
    28,429.64x = 615,304,006.23
  5. Step 5: Solve for x
    x = 615,304,006.23/28,429.64
  6. Step 6: Final answer
    x = 21,643.05

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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.