Home / 30,678.33-42,343.79-18,748.65

Finding the Fourth Proportional to 30,678.33, 42,343.79 and 18,748.65

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Solution

The fourth proportional to 30,678.33, 42,343.79 and 18,748.65 is: 25,877.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,678.33 : 42,343.79 = 18,748.65 : x
  2. Step 2: Convert to fraction form
    30,678.33/42,343.79 = 18,748.65/x
  3. Step 3: Cross multiply
    30,678.33x = 42,343.79 × 18,748.65
  4. Step 4: Simplify right side
    30,678.33x = 793,888,804.64
  5. Step 5: Solve for x
    x = 793,888,804.64/30,678.33
  6. Step 6: Final answer
    x = 25,877.84

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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.