Home / 28,685.90-39,585.26-15,939.98

Finding the Fourth Proportional to 28,685.90, 39,585.26 and 15,939.98

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Solution

The fourth proportional to 28,685.90, 39,585.26 and 15,939.98 is: 21,996.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,685.90 : 39,585.26 = 15,939.98 : x
  2. Step 2: Convert to fraction form
    28,685.90/39,585.26 = 15,939.98/x
  3. Step 3: Cross multiply
    28,685.90x = 39,585.26 × 15,939.98
  4. Step 4: Simplify right side
    28,685.90x = 630,988,172.99
  5. Step 5: Solve for x
    x = 630,988,172.99/28,685.90
  6. Step 6: Final answer
    x = 21,996.46

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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.