Home / 30,935.21-42,658.31-18,357.53

Finding the Fourth Proportional to 30,935.21, 42,658.31 and 18,357.53

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Solution

The fourth proportional to 30,935.21, 42,658.31 and 18,357.53 is: 25,314.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,935.21 : 42,658.31 = 18,357.53 : x
  2. Step 2: Convert to fraction form
    30,935.21/42,658.31 = 18,357.53/x
  3. Step 3: Cross multiply
    30,935.21x = 42,658.31 × 18,357.53
  4. Step 4: Simplify right side
    30,935.21x = 783,101,038.18
  5. Step 5: Solve for x
    x = 783,101,038.18/30,935.21
  6. Step 6: Final answer
    x = 25,314.23

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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.