Home / 30,419.48-45,621.30-12,880.28

Finding the Fourth Proportional to 30,419.48, 45,621.30 and 12,880.28

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Solution

The fourth proportional to 30,419.48, 45,621.30 and 12,880.28 is: 19,317.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,419.48 : 45,621.30 = 12,880.28 : x
  2. Step 2: Convert to fraction form
    30,419.48/45,621.30 = 12,880.28/x
  3. Step 3: Cross multiply
    30,419.48x = 45,621.30 × 12,880.28
  4. Step 4: Simplify right side
    30,419.48x = 587,615,117.96
  5. Step 5: Solve for x
    x = 587,615,117.96/30,419.48
  6. Step 6: Final answer
    x = 19,317.07

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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.