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Finding the Fourth Proportional to 19,792.20, 29,681.10 and 9,928.20

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Solution

The fourth proportional to 19,792.20, 29,681.10 and 9,928.20 is: 14,888.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,792.20 : 29,681.10 = 9,928.20 : x
  2. Step 2: Convert to fraction form
    19,792.20/29,681.10 = 9,928.20/x
  3. Step 3: Cross multiply
    19,792.20x = 29,681.10 × 9,928.20
  4. Step 4: Simplify right side
    19,792.20x = 294,679,897.02
  5. Step 5: Solve for x
    x = 294,679,897.02/19,792.20
  6. Step 6: Final answer
    x = 14,888.69

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1.5x scale

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.