Home / 30,615.16-42,242.34-20,020.36

Finding the Fourth Proportional to 30,615.16, 42,242.34 and 20,020.36

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Solution

The fourth proportional to 30,615.16, 42,242.34 and 20,020.36 is: 27,623.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,615.16 : 42,242.34 = 20,020.36 : x
  2. Step 2: Convert to fraction form
    30,615.16/42,242.34 = 20,020.36/x
  3. Step 3: Cross multiply
    30,615.16x = 42,242.34 × 20,020.36
  4. Step 4: Simplify right side
    30,615.16x = 845,706,854.04
  5. Step 5: Solve for x
    x = 845,706,854.04/30,615.16
  6. Step 6: Final answer
    x = 27,623.79

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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.