Home / 42,478.61-63,717.48-11,313.86

Finding the Fourth Proportional to 42,478.61, 63,717.48 and 11,313.86

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Solution

The fourth proportional to 42,478.61, 63,717.48 and 11,313.86 is: 16,970.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,478.61 : 63,717.48 = 11,313.86 : x
  2. Step 2: Convert to fraction form
    42,478.61/63,717.48 = 11,313.86/x
  3. Step 3: Cross multiply
    42,478.61x = 63,717.48 × 11,313.86
  4. Step 4: Simplify right side
    42,478.61x = 720,890,329.69
  5. Step 5: Solve for x
    x = 720,890,329.69/42,478.61
  6. Step 6: Final answer
    x = 16,970.67

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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.