Home / 28,685.19-39,585.49-15,938.32

Finding the Fourth Proportional to 28,685.19, 39,585.49 and 15,938.32

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Solution

The fourth proportional to 28,685.19, 39,585.49 and 15,938.32 is: 21,994.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.19 : 39,585.49 = 15,938.32 : x
  2. Step 2: Convert to fraction form
    28,685.19/39,585.49 = 15,938.32/x
  3. Step 3: Cross multiply
    28,685.19x = 39,585.49 × 15,938.32
  4. Step 4: Simplify right side
    28,685.19x = 630,926,206.98
  5. Step 5: Solve for x
    x = 630,926,206.98/28,685.19
  6. Step 6: Final answer
    x = 21,994.84

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Double scale
Find fourth proportional to 28,686.19, 39,586.87 and 15,939.32
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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.