Home / 13,639.89-20,460.70-4,280.28

Finding the Fourth Proportional to 13,639.89, 20,460.70 and 4,280.28

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Solution

The fourth proportional to 13,639.89, 20,460.70 and 4,280.28 is: 6,420.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.89 : 20,460.70 = 4,280.28 : x
  2. Step 2: Convert to fraction form
    13,639.89/20,460.70 = 4,280.28/x
  3. Step 3: Cross multiply
    13,639.89x = 20,460.70 × 4,280.28
  4. Step 4: Simplify right side
    13,639.89x = 87,577,510.11
  5. Step 5: Solve for x
    x = 87,577,510.11/13,639.89
  6. Step 6: Final answer
    x = 6,420.69

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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.