Home / 28,130.45-38,821.05-15,384.49

Finding the Fourth Proportional to 28,130.45, 38,821.05 and 15,384.49

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Solution

The fourth proportional to 28,130.45, 38,821.05 and 15,384.49 is: 21,231.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,130.45 : 38,821.05 = 15,384.49 : x
  2. Step 2: Convert to fraction form
    28,130.45/38,821.05 = 15,384.49/x
  3. Step 3: Cross multiply
    28,130.45x = 38,821.05 × 15,384.49
  4. Step 4: Simplify right side
    28,130.45x = 597,241,958.46
  5. Step 5: Solve for x
    x = 597,241,958.46/28,130.45
  6. Step 6: Final answer
    x = 21,231.16

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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.