Home / 28,253.28-38,988.60-15,678.96

Finding the Fourth Proportional to 28,253.28, 38,988.60 and 15,678.96

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Solution

The fourth proportional to 28,253.28, 38,988.60 and 15,678.96 is: 21,636.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.28 : 38,988.60 = 15,678.96 : x
  2. Step 2: Convert to fraction form
    28,253.28/38,988.60 = 15,678.96/x
  3. Step 3: Cross multiply
    28,253.28x = 38,988.60 × 15,678.96
  4. Step 4: Simplify right side
    28,253.28x = 611,300,699.86
  5. Step 5: Solve for x
    x = 611,300,699.86/28,253.28
  6. Step 6: Final answer
    x = 21,636.45

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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.