Home / 28,689.82-39,580.89-21,154.03

Finding the Fourth Proportional to 28,689.82, 39,580.89 and 21,154.03

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Solution

The fourth proportional to 28,689.82, 39,580.89 and 21,154.03 is: 29,184.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.82 : 39,580.89 = 21,154.03 : x
  2. Step 2: Convert to fraction form
    28,689.82/39,580.89 = 21,154.03/x
  3. Step 3: Cross multiply
    28,689.82x = 39,580.89 × 21,154.03
  4. Step 4: Simplify right side
    28,689.82x = 837,295,334.49
  5. Step 5: Solve for x
    x = 837,295,334.49/28,689.82
  6. Step 6: Final answer
    x = 29,184.41

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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.