Home / 30,820.47-42,502.02-18,722.71

Finding the Fourth Proportional to 30,820.47, 42,502.02 and 18,722.71

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Solution

The fourth proportional to 30,820.47, 42,502.02 and 18,722.71 is: 25,818.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,820.47 : 42,502.02 = 18,722.71 : x
  2. Step 2: Convert to fraction form
    30,820.47/42,502.02 = 18,722.71/x
  3. Step 3: Cross multiply
    30,820.47x = 42,502.02 × 18,722.71
  4. Step 4: Simplify right side
    30,820.47x = 795,752,994.87
  5. Step 5: Solve for x
    x = 795,752,994.87/30,820.47
  6. Step 6: Final answer
    x = 25,818.98

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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.