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Finding the Fourth Proportional to 15,693, 21,656.23 and 9,405.37

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Solution

The fourth proportional to 15,693, 21,656.23 and 9,405.37 is: 12,979.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,693 : 21,656.23 = 9,405.37 : x
  2. Step 2: Convert to fraction form
    15,693/21,656.23 = 9,405.37/x
  3. Step 3: Cross multiply
    15,693x = 21,656.23 × 9,405.37
  4. Step 4: Simplify right side
    15,693x = 203,684,855.96
  5. Step 5: Solve for x
    x = 203,684,855.96/15,693
  6. Step 6: Final answer
    x = 12,979.34

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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.