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Finding the Fourth Proportional to 15,495.91, 21,387.45 and 9,837.40

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Solution

The fourth proportional to 15,495.91, 21,387.45 and 9,837.40 is: 13,577.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.91 : 21,387.45 = 9,837.40 : x
  2. Step 2: Convert to fraction form
    15,495.91/21,387.45 = 9,837.40/x
  3. Step 3: Cross multiply
    15,495.91x = 21,387.45 × 9,837.40
  4. Step 4: Simplify right side
    15,495.91x = 210,396,900.63
  5. Step 5: Solve for x
    x = 210,396,900.63/15,495.91
  6. Step 6: Final answer
    x = 13,577.58

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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.