Home / 30,631.51-42,276.02-18,701.76

Finding the Fourth Proportional to 30,631.51, 42,276.02 and 18,701.76

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Solution

The fourth proportional to 30,631.51, 42,276.02 and 18,701.76 is: 25,811.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.51 : 42,276.02 = 18,701.76 : x
  2. Step 2: Convert to fraction form
    30,631.51/42,276.02 = 18,701.76/x
  3. Step 3: Cross multiply
    30,631.51x = 42,276.02 × 18,701.76
  4. Step 4: Simplify right side
    30,631.51x = 790,635,979.80
  5. Step 5: Solve for x
    x = 790,635,979.80/30,631.51
  6. Step 6: Final answer
    x = 25,811.20

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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.