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Finding the Fourth Proportional to 28,056.75, 38,719.13 and 15,482.31

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Solution

The fourth proportional to 28,056.75, 38,719.13 and 15,482.31 is: 21,366.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,056.75 : 38,719.13 = 15,482.31 : x
  2. Step 2: Convert to fraction form
    28,056.75/38,719.13 = 15,482.31/x
  3. Step 3: Cross multiply
    28,056.75x = 38,719.13 × 15,482.31
  4. Step 4: Simplify right side
    28,056.75x = 599,461,496.18
  5. Step 5: Solve for x
    x = 599,461,496.18/28,056.75
  6. Step 6: Final answer
    x = 21,366.03

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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.