Home / 28,718.15-39,619.73-21,182.61

Finding the Fourth Proportional to 28,718.15, 39,619.73 and 21,182.61

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Solution

The fourth proportional to 28,718.15, 39,619.73 and 21,182.61 is: 29,223.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.15 : 39,619.73 = 21,182.61 : x
  2. Step 2: Convert to fraction form
    28,718.15/39,619.73 = 21,182.61/x
  3. Step 3: Cross multiply
    28,718.15x = 39,619.73 × 21,182.61
  4. Step 4: Simplify right side
    28,718.15x = 839,249,490.43
  5. Step 5: Solve for x
    x = 839,249,490.43/28,718.15
  6. Step 6: Final answer
    x = 29,223.67

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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.