Home / 15,751.28-21,718.72-11,765.66

Finding the Fourth Proportional to 15,751.28, 21,718.72 and 11,765.66

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Solution

The fourth proportional to 15,751.28, 21,718.72 and 11,765.66 is: 16,223.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,751.28 : 21,718.72 = 11,765.66 : x
  2. Step 2: Convert to fraction form
    15,751.28/21,718.72 = 11,765.66/x
  3. Step 3: Cross multiply
    15,751.28x = 21,718.72 × 11,765.66
  4. Step 4: Simplify right side
    15,751.28x = 255,535,075.16
  5. Step 5: Solve for x
    x = 255,535,075.16/15,751.28
  6. Step 6: Final answer
    x = 16,223.13

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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.