Home / 15,931.69-21,986.24-8,858.57

Finding the Fourth Proportional to 15,931.69, 21,986.24 and 8,858.57

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Solution

The fourth proportional to 15,931.69, 21,986.24 and 8,858.57 is: 12,225.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.69 : 21,986.24 = 8,858.57 : x
  2. Step 2: Convert to fraction form
    15,931.69/21,986.24 = 8,858.57/x
  3. Step 3: Cross multiply
    15,931.69x = 21,986.24 × 8,858.57
  4. Step 4: Simplify right side
    15,931.69x = 194,766,491.85
  5. Step 5: Solve for x
    x = 194,766,491.85/15,931.69
  6. Step 6: Final answer
    x = 12,225.10

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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.