Home / 51,678.78-71,308.14-30,455.16

Finding the Fourth Proportional to 51,678.78, 71,308.14 and 30,455.16

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Solution

The fourth proportional to 51,678.78, 71,308.14 and 30,455.16 is: 42,023.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,678.78 : 71,308.14 = 30,455.16 : x
  2. Step 2: Convert to fraction form
    51,678.78/71,308.14 = 30,455.16/x
  3. Step 3: Cross multiply
    51,678.78x = 71,308.14 × 30,455.16
  4. Step 4: Simplify right side
    51,678.78x = 2,171,700,813.00
  5. Step 5: Solve for x
    x = 2,171,700,813.00/51,678.78
  6. Step 6: Final answer
    x = 42,023.07

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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.