Home / 30,642.17-42,249.40-22,130.69

Finding the Fourth Proportional to 30,642.17, 42,249.40 and 22,130.69

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Solution

The fourth proportional to 30,642.17, 42,249.40 and 22,130.69 is: 30,513.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,642.17 : 42,249.40 = 22,130.69 : x
  2. Step 2: Convert to fraction form
    30,642.17/42,249.40 = 22,130.69/x
  3. Step 3: Cross multiply
    30,642.17x = 42,249.40 × 22,130.69
  4. Step 4: Simplify right side
    30,642.17x = 935,008,107.51
  5. Step 5: Solve for x
    x = 935,008,107.51/30,642.17
  6. Step 6: Final answer
    x = 30,513.77

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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.