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Finding the Fourth Proportional to 12,646.64, 17,455.80 and 7,340.40

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Solution

The fourth proportional to 12,646.64, 17,455.80 and 7,340.40 is: 10,131.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,646.64 : 17,455.80 = 7,340.40 : x
  2. Step 2: Convert to fraction form
    12,646.64/17,455.80 = 7,340.40/x
  3. Step 3: Cross multiply
    12,646.64x = 17,455.80 × 7,340.40
  4. Step 4: Simplify right side
    12,646.64x = 128,132,554.32
  5. Step 5: Solve for x
    x = 128,132,554.32/12,646.64
  6. Step 6: Final answer
    x = 10,131.75

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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.