Home / 30,147.40-45,215.42-12,612.52

Finding the Fourth Proportional to 30,147.40, 45,215.42 and 12,612.52

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Solution

The fourth proportional to 30,147.40, 45,215.42 and 12,612.52 is: 18,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,147.40 : 45,215.42 = 12,612.52 : x
  2. Step 2: Convert to fraction form
    30,147.40/45,215.42 = 12,612.52/x
  3. Step 3: Cross multiply
    30,147.40x = 45,215.42 × 12,612.52
  4. Step 4: Simplify right side
    30,147.40x = 570,280,389.06
  5. Step 5: Solve for x
    x = 570,280,389.06/30,147.40
  6. Step 6: Final answer
    x = 18,916.40

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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.