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Finding the Fourth Proportional to 15,642.60, 21,584.74 and 9,352.68

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Solution

The fourth proportional to 15,642.60, 21,584.74 and 9,352.68 is: 12,905.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,642.60 : 21,584.74 = 9,352.68 : x
  2. Step 2: Convert to fraction form
    15,642.60/21,584.74 = 9,352.68/x
  3. Step 3: Cross multiply
    15,642.60x = 21,584.74 × 9,352.68
  4. Step 4: Simplify right side
    15,642.60x = 201,875,166.10
  5. Step 5: Solve for x
    x = 201,875,166.10/15,642.60
  6. Step 6: Final answer
    x = 12,905.47

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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.