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Finding the Fourth Proportional to 14,363.86, 19,821.76 and 7,990.47

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Solution

The fourth proportional to 14,363.86, 19,821.76 and 7,990.47 is: 11,026.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,363.86 : 19,821.76 = 7,990.47 : x
  2. Step 2: Convert to fraction form
    14,363.86/19,821.76 = 7,990.47/x
  3. Step 3: Cross multiply
    14,363.86x = 19,821.76 × 7,990.47
  4. Step 4: Simplify right side
    14,363.86x = 158,385,178.63
  5. Step 5: Solve for x
    x = 158,385,178.63/14,363.86
  6. Step 6: Final answer
    x = 11,026.64

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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.