Home / 28,671.63-42,924-21,308.73

Finding the Fourth Proportional to 28,671.63, 42,924 and 21,308.73

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Solution

The fourth proportional to 28,671.63, 42,924 and 21,308.73 is: 31,901.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,671.63 : 42,924 = 21,308.73 : x
  2. Step 2: Convert to fraction form
    28,671.63/42,924 = 21,308.73/x
  3. Step 3: Cross multiply
    28,671.63x = 42,924 × 21,308.73
  4. Step 4: Simplify right side
    28,671.63x = 914,655,926.52
  5. Step 5: Solve for x
    x = 914,655,926.52/28,671.63
  6. Step 6: Final answer
    x = 31,901.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.