Home / 30,631.45-42,278.12-19,307.65

Finding the Fourth Proportional to 30,631.45, 42,278.12 and 19,307.65

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Solution

The fourth proportional to 30,631.45, 42,278.12 and 19,307.65 is: 26,648.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,631.45 : 42,278.12 = 19,307.65 : x
  2. Step 2: Convert to fraction form
    30,631.45/42,278.12 = 19,307.65/x
  3. Step 3: Cross multiply
    30,631.45x = 42,278.12 × 19,307.65
  4. Step 4: Simplify right side
    30,631.45x = 816,291,047.08
  5. Step 5: Solve for x
    x = 816,291,047.08/30,631.45
  6. Step 6: Final answer
    x = 26,648.79

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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.