Home / 28,257.84-38,996.46-15,683.40

Finding the Fourth Proportional to 28,257.84, 38,996.46 and 15,683.40

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Solution

The fourth proportional to 28,257.84, 38,996.46 and 15,683.40 is: 21,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.84 : 38,996.46 = 15,683.40 : x
  2. Step 2: Convert to fraction form
    28,257.84/38,996.46 = 15,683.40/x
  3. Step 3: Cross multiply
    28,257.84x = 38,996.46 × 15,683.40
  4. Step 4: Simplify right side
    28,257.84x = 611,597,080.76
  5. Step 5: Solve for x
    x = 611,597,080.76/28,257.84
  6. Step 6: Final answer
    x = 21,643.45

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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.