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Finding the Fourth Proportional to 15,357.60, 21,191.94 and 8,642.64

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Solution

The fourth proportional to 15,357.60, 21,191.94 and 8,642.64 is: 11,925.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.60 : 21,191.94 = 8,642.64 : x
  2. Step 2: Convert to fraction form
    15,357.60/21,191.94 = 8,642.64/x
  3. Step 3: Cross multiply
    15,357.60x = 21,191.94 × 8,642.64
  4. Step 4: Simplify right side
    15,357.60x = 183,154,308.32
  5. Step 5: Solve for x
    x = 183,154,308.32/15,357.60
  6. Step 6: Final answer
    x = 11,925.97

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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.