Home / 13,330.74-19,981.53-8,402.70

Finding the Fourth Proportional to 13,330.74, 19,981.53 and 8,402.70

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Solution

The fourth proportional to 13,330.74, 19,981.53 and 8,402.70 is: 12,594.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,330.74 : 19,981.53 = 8,402.70 : x
  2. Step 2: Convert to fraction form
    13,330.74/19,981.53 = 8,402.70/x
  3. Step 3: Cross multiply
    13,330.74x = 19,981.53 × 8,402.70
  4. Step 4: Simplify right side
    13,330.74x = 167,898,802.13
  5. Step 5: Solve for x
    x = 167,898,802.13/13,330.74
  6. Step 6: Final answer
    x = 12,594.86

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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.