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Finding the Fourth Proportional to 42,955.84, 64,422.08 and 11,783.68

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Solution

The fourth proportional to 42,955.84, 64,422.08 and 11,783.68 is: 17,672.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,955.84 : 64,422.08 = 11,783.68 : x
  2. Step 2: Convert to fraction form
    42,955.84/64,422.08 = 11,783.68/x
  3. Step 3: Cross multiply
    42,955.84x = 64,422.08 × 11,783.68
  4. Step 4: Simplify right side
    42,955.84x = 759,129,175.65
  5. Step 5: Solve for x
    x = 759,129,175.65/42,955.84
  6. Step 6: Final answer
    x = 17,672.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.