Home / 13,812.40-20,718.60-4,578.40

Finding the Fourth Proportional to 13,812.40, 20,718.60 and 4,578.40

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Solution

The fourth proportional to 13,812.40, 20,718.60 and 4,578.40 is: 6,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.40 : 20,718.60 = 4,578.40 : x
  2. Step 2: Convert to fraction form
    13,812.40/20,718.60 = 4,578.40/x
  3. Step 3: Cross multiply
    13,812.40x = 20,718.60 × 4,578.40
  4. Step 4: Simplify right side
    13,812.40x = 94,858,038.24
  5. Step 5: Solve for x
    x = 94,858,038.24/13,812.40
  6. Step 6: Final answer
    x = 6,867.60

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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.