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Finding the Fourth Proportional to 18,762.71, 28,130.29 and 8,890.43

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Solution

The fourth proportional to 18,762.71, 28,130.29 and 8,890.43 is: 13,329.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,762.71 : 28,130.29 = 8,890.43 : x
  2. Step 2: Convert to fraction form
    18,762.71/28,130.29 = 8,890.43/x
  3. Step 3: Cross multiply
    18,762.71x = 28,130.29 × 8,890.43
  4. Step 4: Simplify right side
    18,762.71x = 250,090,211.25
  5. Step 5: Solve for x
    x = 250,090,211.25/18,762.71
  6. Step 6: Final answer
    x = 13,329.11

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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.