Home / 30,629.40-42,275.16-18,690.18

Finding the Fourth Proportional to 30,629.40, 42,275.16 and 18,690.18

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Solution

The fourth proportional to 30,629.40, 42,275.16 and 18,690.18 is: 25,796.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,629.40 : 42,275.16 = 18,690.18 : x
  2. Step 2: Convert to fraction form
    30,629.40/42,275.16 = 18,690.18/x
  3. Step 3: Cross multiply
    30,629.40x = 42,275.16 × 18,690.18
  4. Step 4: Simplify right side
    30,629.40x = 790,130,349.93
  5. Step 5: Solve for x
    x = 790,130,349.93/30,629.40
  6. Step 6: Final answer
    x = 25,796.47

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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.