Home / 56,428.47-77,867.00-30,930.75

Finding the Fourth Proportional to 56,428.47, 77,867.00 and 30,930.75

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Solution

The fourth proportional to 56,428.47, 77,867.00 and 30,930.75 is: 42,682.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,428.47 : 77,867.00 = 30,930.75 : x
  2. Step 2: Convert to fraction form
    56,428.47/77,867.00 = 30,930.75/x
  3. Step 3: Cross multiply
    56,428.47x = 77,867.00 × 30,930.75
  4. Step 4: Simplify right side
    56,428.47x = 2,408,484,555.60
  5. Step 5: Solve for x
    x = 2,408,484,555.60/56,428.47
  6. Step 6: Final answer
    x = 42,682.08

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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.