Home / 30,743.08-42,428.64-18,814.36

Finding the Fourth Proportional to 30,743.08, 42,428.64 and 18,814.36

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Solution

The fourth proportional to 30,743.08, 42,428.64 and 18,814.36 is: 25,965.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,743.08 : 42,428.64 = 18,814.36 : x
  2. Step 2: Convert to fraction form
    30,743.08/42,428.64 = 18,814.36/x
  3. Step 3: Cross multiply
    30,743.08x = 42,428.64 × 18,814.36
  4. Step 4: Simplify right side
    30,743.08x = 798,267,707.27
  5. Step 5: Solve for x
    x = 798,267,707.27/30,743.08
  6. Step 6: Final answer
    x = 25,965.77

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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.