Home / 28,253.52-38,989.88-15,678.28

Finding the Fourth Proportional to 28,253.52, 38,989.88 and 15,678.28

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Solution

The fourth proportional to 28,253.52, 38,989.88 and 15,678.28 is: 21,636.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.52 : 38,989.88 = 15,678.28 : x
  2. Step 2: Convert to fraction form
    28,253.52/38,989.88 = 15,678.28/x
  3. Step 3: Cross multiply
    28,253.52x = 38,989.88 × 15,678.28
  4. Step 4: Simplify right side
    28,253.52x = 611,294,255.81
  5. Step 5: Solve for x
    x = 611,294,255.81/28,253.52
  6. Step 6: Final answer
    x = 21,636.04

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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.