Home / 30,533.14-42,135.15-19,902.70

Finding the Fourth Proportional to 30,533.14, 42,135.15 and 19,902.70

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Solution

The fourth proportional to 30,533.14, 42,135.15 and 19,902.70 is: 27,465.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,533.14 : 42,135.15 = 19,902.70 : x
  2. Step 2: Convert to fraction form
    30,533.14/42,135.15 = 19,902.70/x
  3. Step 3: Cross multiply
    30,533.14x = 42,135.15 × 19,902.70
  4. Step 4: Simplify right side
    30,533.14x = 838,603,249.91
  5. Step 5: Solve for x
    x = 838,603,249.91/30,533.14
  6. Step 6: Final answer
    x = 27,465.35

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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.