Home / 30,643.92-45,938.14-21,288.32

Finding the Fourth Proportional to 30,643.92, 45,938.14 and 21,288.32

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Solution

The fourth proportional to 30,643.92, 45,938.14 and 21,288.32 is: 31,913.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,643.92 : 45,938.14 = 21,288.32 : x
  2. Step 2: Convert to fraction form
    30,643.92/45,938.14 = 21,288.32/x
  3. Step 3: Cross multiply
    30,643.92x = 45,938.14 × 21,288.32
  4. Step 4: Simplify right side
    30,643.92x = 977,945,713.88
  5. Step 5: Solve for x
    x = 977,945,713.88/30,643.92
  6. Step 6: Final answer
    x = 31,913.21

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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.