Home / 15,155.03-20,913.88-8,440.74

Finding the Fourth Proportional to 15,155.03, 20,913.88 and 8,440.74

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Solution

The fourth proportional to 15,155.03, 20,913.88 and 8,440.74 is: 11,648.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,155.03 : 20,913.88 = 8,440.74 : x
  2. Step 2: Convert to fraction form
    15,155.03/20,913.88 = 8,440.74/x
  3. Step 3: Cross multiply
    15,155.03x = 20,913.88 × 8,440.74
  4. Step 4: Simplify right side
    15,155.03x = 176,528,623.47
  5. Step 5: Solve for x
    x = 176,528,623.47/15,155.03
  6. Step 6: Final answer
    x = 11,648.19

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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.