Home / 28,561.81-39,415.28-15,986.56

Finding the Fourth Proportional to 28,561.81, 39,415.28 and 15,986.56

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Solution

The fourth proportional to 28,561.81, 39,415.28 and 15,986.56 is: 22,061.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,561.81 : 39,415.28 = 15,986.56 : x
  2. Step 2: Convert to fraction form
    28,561.81/39,415.28 = 15,986.56/x
  3. Step 3: Cross multiply
    28,561.81x = 39,415.28 × 15,986.56
  4. Step 4: Simplify right side
    28,561.81x = 630,114,541.56
  5. Step 5: Solve for x
    x = 630,114,541.56/28,561.81
  6. Step 6: Final answer
    x = 22,061.44

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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.