Home / 15,865.86-21,895.05-9,151.37

Finding the Fourth Proportional to 15,865.86, 21,895.05 and 9,151.37

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Solution

The fourth proportional to 15,865.86, 21,895.05 and 9,151.37 is: 12,628.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,865.86 : 21,895.05 = 9,151.37 : x
  2. Step 2: Convert to fraction form
    15,865.86/21,895.05 = 9,151.37/x
  3. Step 3: Cross multiply
    15,865.86x = 21,895.05 × 9,151.37
  4. Step 4: Simplify right side
    15,865.86x = 200,369,594.24
  5. Step 5: Solve for x
    x = 200,369,594.24/15,865.86
  6. Step 6: Final answer
    x = 12,628.98

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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.