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Finding the Fourth Proportional to 18,779.95, 25,916.63 and 10,281.93

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Solution

The fourth proportional to 18,779.95, 25,916.63 and 10,281.93 is: 14,189.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.95 : 25,916.63 = 10,281.93 : x
  2. Step 2: Convert to fraction form
    18,779.95/25,916.63 = 10,281.93/x
  3. Step 3: Cross multiply
    18,779.95x = 25,916.63 × 10,281.93
  4. Step 4: Simplify right side
    18,779.95x = 266,472,975.50
  5. Step 5: Solve for x
    x = 266,472,975.50/18,779.95
  6. Step 6: Final answer
    x = 14,189.23

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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.