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Finding the Fourth Proportional to 15,339.60, 23,009.40 and 15,120.90

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Solution

The fourth proportional to 15,339.60, 23,009.40 and 15,120.90 is: 22,681.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,339.60 : 23,009.40 = 15,120.90 : x
  2. Step 2: Convert to fraction form
    15,339.60/23,009.40 = 15,120.90/x
  3. Step 3: Cross multiply
    15,339.60x = 23,009.40 × 15,120.90
  4. Step 4: Simplify right side
    15,339.60x = 347,922,836.46
  5. Step 5: Solve for x
    x = 347,922,836.46/15,339.60
  6. Step 6: Final answer
    x = 22,681.35

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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.