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Finding the Fourth Proportional to 14,117.64, 19,482.96 and 7,830

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Solution

The fourth proportional to 14,117.64, 19,482.96 and 7,830 is: 10,805.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,117.64 : 19,482.96 = 7,830 : x
  2. Step 2: Convert to fraction form
    14,117.64/19,482.96 = 7,830/x
  3. Step 3: Cross multiply
    14,117.64x = 19,482.96 × 7,830
  4. Step 4: Simplify right side
    14,117.64x = 152,551,576.80
  5. Step 5: Solve for x
    x = 152,551,576.80/14,117.64
  6. Step 6: Final answer
    x = 10,805.74

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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.