Home / 20,715.86-28,586.94-11,762.12

Finding the Fourth Proportional to 20,715.86, 28,586.94 and 11,762.12

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Solution

The fourth proportional to 20,715.86, 28,586.94 and 11,762.12 is: 16,231.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.86 : 28,586.94 = 11,762.12 : x
  2. Step 2: Convert to fraction form
    20,715.86/28,586.94 = 11,762.12/x
  3. Step 3: Cross multiply
    20,715.86x = 28,586.94 × 11,762.12
  4. Step 4: Simplify right side
    20,715.86x = 336,243,018.71
  5. Step 5: Solve for x
    x = 336,243,018.71/20,715.86
  6. Step 6: Final answer
    x = 16,231.19

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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.