Home / 30,281.92-45,428.36-12,512.60

Finding the Fourth Proportional to 30,281.92, 45,428.36 and 12,512.60

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Solution

The fourth proportional to 30,281.92, 45,428.36 and 12,512.60 is: 18,771.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,281.92 : 45,428.36 = 12,512.60 : x
  2. Step 2: Convert to fraction form
    30,281.92/45,428.36 = 12,512.60/x
  3. Step 3: Cross multiply
    30,281.92x = 45,428.36 × 12,512.60
  4. Step 4: Simplify right side
    30,281.92x = 568,426,897.34
  5. Step 5: Solve for x
    x = 568,426,897.34/30,281.92
  6. Step 6: Final answer
    x = 18,771.16

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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.