Home / 20,405.04-30,607.68-5,615.52

Finding the Fourth Proportional to 20,405.04, 30,607.68 and 5,615.52

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Solution

The fourth proportional to 20,405.04, 30,607.68 and 5,615.52 is: 8,423.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405.04 : 30,607.68 = 5,615.52 : x
  2. Step 2: Convert to fraction form
    20,405.04/30,607.68 = 5,615.52/x
  3. Step 3: Cross multiply
    20,405.04x = 30,607.68 × 5,615.52
  4. Step 4: Simplify right side
    20,405.04x = 171,878,039.19
  5. Step 5: Solve for x
    x = 171,878,039.19/20,405.04
  6. Step 6: Final answer
    x = 8,423.31

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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.