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Finding the Fourth Proportional to 18,916.88, 28,347.32 and 16,840.76

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Solution

The fourth proportional to 18,916.88, 28,347.32 and 16,840.76 is: 25,236.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.88 : 28,347.32 = 16,840.76 : x
  2. Step 2: Convert to fraction form
    18,916.88/28,347.32 = 16,840.76/x
  3. Step 3: Cross multiply
    18,916.88x = 28,347.32 × 16,840.76
  4. Step 4: Simplify right side
    18,916.88x = 477,390,412.76
  5. Step 5: Solve for x
    x = 477,390,412.76/18,916.88
  6. Step 6: Final answer
    x = 25,236.21

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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.