Home / 13,258.61-18,287.20-8,411.71

Finding the Fourth Proportional to 13,258.61, 18,287.20 and 8,411.71

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Solution

The fourth proportional to 13,258.61, 18,287.20 and 8,411.71 is: 11,602.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,258.61 : 18,287.20 = 8,411.71 : x
  2. Step 2: Convert to fraction form
    13,258.61/18,287.20 = 8,411.71/x
  3. Step 3: Cross multiply
    13,258.61x = 18,287.20 × 8,411.71
  4. Step 4: Simplify right side
    13,258.61x = 153,826,623.11
  5. Step 5: Solve for x
    x = 153,826,623.11/13,258.61
  6. Step 6: Final answer
    x = 11,602.02

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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.