Home / 28,308.05-39,070.76-21,581.66

Finding the Fourth Proportional to 28,308.05, 39,070.76 and 21,581.66

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Solution

The fourth proportional to 28,308.05, 39,070.76 and 21,581.66 is: 29,787.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,308.05 : 39,070.76 = 21,581.66 : x
  2. Step 2: Convert to fraction form
    28,308.05/39,070.76 = 21,581.66/x
  3. Step 3: Cross multiply
    28,308.05x = 39,070.76 × 21,581.66
  4. Step 4: Simplify right side
    28,308.05x = 843,211,716.86
  5. Step 5: Solve for x
    x = 843,211,716.86/28,308.05
  6. Step 6: Final answer
    x = 29,787.00

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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.