Home / 28,967.85-39,966.89-21,065.49

Finding the Fourth Proportional to 28,967.85, 39,966.89 and 21,065.49

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Solution

The fourth proportional to 28,967.85, 39,966.89 and 21,065.49 is: 29,064.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,967.85 : 39,966.89 = 21,065.49 : x
  2. Step 2: Convert to fraction form
    28,967.85/39,966.89 = 21,065.49/x
  3. Step 3: Cross multiply
    28,967.85x = 39,966.89 × 21,065.49
  4. Step 4: Simplify right side
    28,967.85x = 841,922,016.30
  5. Step 5: Solve for x
    x = 841,922,016.30/28,967.85
  6. Step 6: Final answer
    x = 29,064.01

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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.