Home / 20,005.20-30,009.48-8,319.60

Finding the Fourth Proportional to 20,005.20, 30,009.48 and 8,319.60

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Solution

The fourth proportional to 20,005.20, 30,009.48 and 8,319.60 is: 12,480.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.20 : 30,009.48 = 8,319.60 : x
  2. Step 2: Convert to fraction form
    20,005.20/30,009.48 = 8,319.60/x
  3. Step 3: Cross multiply
    20,005.20x = 30,009.48 × 8,319.60
  4. Step 4: Simplify right side
    20,005.20x = 249,666,869.81
  5. Step 5: Solve for x
    x = 249,666,869.81/20,005.20
  6. Step 6: Final answer
    x = 12,480.10

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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.