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Finding the Fourth Proportional to 19,987.30, 29,948.55 and 17,071.30

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Solution

The fourth proportional to 19,987.30, 29,948.55 and 17,071.30 is: 25,579.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.30 : 29,948.55 = 17,071.30 : x
  2. Step 2: Convert to fraction form
    19,987.30/29,948.55 = 17,071.30/x
  3. Step 3: Cross multiply
    19,987.30x = 29,948.55 × 17,071.30
  4. Step 4: Simplify right side
    19,987.30x = 511,260,681.62
  5. Step 5: Solve for x
    x = 511,260,681.62/19,987.30
  6. Step 6: Final answer
    x = 25,579.28

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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.