Home / 30,485.48-42,066.12-18,386.56

Finding the Fourth Proportional to 30,485.48, 42,066.12 and 18,386.56

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Solution

The fourth proportional to 30,485.48, 42,066.12 and 18,386.56 is: 25,371.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,485.48 : 42,066.12 = 18,386.56 : x
  2. Step 2: Convert to fraction form
    30,485.48/42,066.12 = 18,386.56/x
  3. Step 3: Cross multiply
    30,485.48x = 42,066.12 × 18,386.56
  4. Step 4: Simplify right side
    30,485.48x = 773,451,239.35
  5. Step 5: Solve for x
    x = 773,451,239.35/30,485.48
  6. Step 6: Final answer
    x = 25,371.14

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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.