Home / 30,375.76-45,533.40-21,122.32

Finding the Fourth Proportional to 30,375.76, 45,533.40 and 21,122.32

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Solution

The fourth proportional to 30,375.76, 45,533.40 and 21,122.32 is: 31,662.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,375.76 : 45,533.40 = 21,122.32 : x
  2. Step 2: Convert to fraction form
    30,375.76/45,533.40 = 21,122.32/x
  3. Step 3: Cross multiply
    30,375.76x = 45,533.40 × 21,122.32
  4. Step 4: Simplify right side
    30,375.76x = 961,771,045.49
  5. Step 5: Solve for x
    x = 961,771,045.49/30,375.76
  6. Step 6: Final answer
    x = 31,662.45

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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.