Home / 10,880.89-15,015.63-6,407.40

Finding the Fourth Proportional to 10,880.89, 15,015.63 and 6,407.40

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Solution

The fourth proportional to 10,880.89, 15,015.63 and 6,407.40 is: 8,842.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,880.89 : 15,015.63 = 6,407.40 : x
  2. Step 2: Convert to fraction form
    10,880.89/15,015.63 = 6,407.40/x
  3. Step 3: Cross multiply
    10,880.89x = 15,015.63 × 6,407.40
  4. Step 4: Simplify right side
    10,880.89x = 96,211,137.48
  5. Step 5: Solve for x
    x = 96,211,137.48/10,880.89
  6. Step 6: Final answer
    x = 8,842.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.