Home / 8,460.16-12,688.80-2,615.20

Finding the Fourth Proportional to 8,460.16, 12,688.80 and 2,615.20

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Solution

The fourth proportional to 8,460.16, 12,688.80 and 2,615.20 is: 3,922.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,460.16 : 12,688.80 = 2,615.20 : x
  2. Step 2: Convert to fraction form
    8,460.16/12,688.80 = 2,615.20/x
  3. Step 3: Cross multiply
    8,460.16x = 12,688.80 × 2,615.20
  4. Step 4: Simplify right side
    8,460.16x = 33,183,749.76
  5. Step 5: Solve for x
    x = 33,183,749.76/8,460.16
  6. Step 6: Final answer
    x = 3,922.35

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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.