Home / 28,110.83-38,775.05-21,381.71

Finding the Fourth Proportional to 28,110.83, 38,775.05 and 21,381.71

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Solution

The fourth proportional to 28,110.83, 38,775.05 and 21,381.71 is: 29,493.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,110.83 : 38,775.05 = 21,381.71 : x
  2. Step 2: Convert to fraction form
    28,110.83/38,775.05 = 21,381.71/x
  3. Step 3: Cross multiply
    28,110.83x = 38,775.05 × 21,381.71
  4. Step 4: Simplify right side
    28,110.83x = 829,076,573.55
  5. Step 5: Solve for x
    x = 829,076,573.55/28,110.83
  6. Step 6: Final answer
    x = 29,493.14

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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.