Home / 30,900.78-46,336.05-21,545.28

Finding the Fourth Proportional to 30,900.78, 46,336.05 and 21,545.28

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Solution

The fourth proportional to 30,900.78, 46,336.05 and 21,545.28 is: 32,307.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,900.78 : 46,336.05 = 21,545.28 : x
  2. Step 2: Convert to fraction form
    30,900.78/46,336.05 = 21,545.28/x
  3. Step 3: Cross multiply
    30,900.78x = 46,336.05 × 21,545.28
  4. Step 4: Simplify right side
    30,900.78x = 998,323,171.34
  5. Step 5: Solve for x
    x = 998,323,171.34/30,900.78
  6. Step 6: Final answer
    x = 32,307.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.