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Finding the Fourth Proportional to 14,115.81, 19,480.53 and 7,828.20

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Solution

The fourth proportional to 14,115.81, 19,480.53 and 7,828.20 is: 10,803.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,115.81 : 19,480.53 = 7,828.20 : x
  2. Step 2: Convert to fraction form
    14,115.81/19,480.53 = 7,828.20/x
  3. Step 3: Cross multiply
    14,115.81x = 19,480.53 × 7,828.20
  4. Step 4: Simplify right side
    14,115.81x = 152,497,484.95
  5. Step 5: Solve for x
    x = 152,497,484.95/14,115.81
  6. Step 6: Final answer
    x = 10,803.31

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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.