Home / 12,905.78-19,345.60-8,746.21

Finding the Fourth Proportional to 12,905.78, 19,345.60 and 8,746.21

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Solution

The fourth proportional to 12,905.78, 19,345.60 and 8,746.21 is: 13,110.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,905.78 : 19,345.60 = 8,746.21 : x
  2. Step 2: Convert to fraction form
    12,905.78/19,345.60 = 8,746.21/x
  3. Step 3: Cross multiply
    12,905.78x = 19,345.60 × 8,746.21
  4. Step 4: Simplify right side
    12,905.78x = 169,200,680.18
  5. Step 5: Solve for x
    x = 169,200,680.18/12,905.78
  6. Step 6: Final answer
    x = 13,110.46

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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.