Home / 28,421.94-39,233.09-21,368.85

Finding the Fourth Proportional to 28,421.94, 39,233.09 and 21,368.85

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Solution

The fourth proportional to 28,421.94, 39,233.09 and 21,368.85 is: 29,497.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,421.94 : 39,233.09 = 21,368.85 : x
  2. Step 2: Convert to fraction form
    28,421.94/39,233.09 = 21,368.85/x
  3. Step 3: Cross multiply
    28,421.94x = 39,233.09 × 21,368.85
  4. Step 4: Simplify right side
    28,421.94x = 838,365,908.40
  5. Step 5: Solve for x
    x = 838,365,908.40/28,421.94
  6. Step 6: Final answer
    x = 29,497.14

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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.