Home / 28,718.16-39,603.42-18,642.84

Finding the Fourth Proportional to 28,718.16, 39,603.42 and 18,642.84

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Solution

The fourth proportional to 28,718.16, 39,603.42 and 18,642.84 is: 25,709.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.16 : 39,603.42 = 18,642.84 : x
  2. Step 2: Convert to fraction form
    28,718.16/39,603.42 = 18,642.84/x
  3. Step 3: Cross multiply
    28,718.16x = 39,603.42 × 18,642.84
  4. Step 4: Simplify right side
    28,718.16x = 738,320,222.51
  5. Step 5: Solve for x
    x = 738,320,222.51/28,718.16
  6. Step 6: Final answer
    x = 25,709.18

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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.