Home / 30,630.51-42,274.64-18,700.76

Finding the Fourth Proportional to 30,630.51, 42,274.64 and 18,700.76

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Solution

The fourth proportional to 30,630.51, 42,274.64 and 18,700.76 is: 25,809.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.51 : 42,274.64 = 18,700.76 : x
  2. Step 2: Convert to fraction form
    30,630.51/42,274.64 = 18,700.76/x
  3. Step 3: Cross multiply
    30,630.51x = 42,274.64 × 18,700.76
  4. Step 4: Simplify right side
    30,630.51x = 790,568,049.16
  5. Step 5: Solve for x
    x = 790,568,049.16/30,630.51
  6. Step 6: Final answer
    x = 25,809.82

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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.