Home / 30,720.87-46,034.37-20,688.48

Finding the Fourth Proportional to 30,720.87, 46,034.37 and 20,688.48

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Solution

The fourth proportional to 30,720.87, 46,034.37 and 20,688.48 is: 31,001.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.87 : 46,034.37 = 20,688.48 : x
  2. Step 2: Convert to fraction form
    30,720.87/46,034.37 = 20,688.48/x
  3. Step 3: Cross multiply
    30,720.87x = 46,034.37 × 20,688.48
  4. Step 4: Simplify right side
    30,720.87x = 952,381,143.06
  5. Step 5: Solve for x
    x = 952,381,143.06/30,720.87
  6. Step 6: Final answer
    x = 31,001.11

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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.