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Finding the Fourth Proportional to 16,762.80, 23,129.43 and 11,389.50

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Solution

The fourth proportional to 16,762.80, 23,129.43 and 11,389.50 is: 15,715.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,762.80 : 23,129.43 = 11,389.50 : x
  2. Step 2: Convert to fraction form
    16,762.80/23,129.43 = 11,389.50/x
  3. Step 3: Cross multiply
    16,762.80x = 23,129.43 × 11,389.50
  4. Step 4: Simplify right side
    16,762.80x = 263,432,642.99
  5. Step 5: Solve for x
    x = 263,432,642.99/16,762.80
  6. Step 6: Final answer
    x = 15,715.31

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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.