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Finding the Fourth Proportional to 15,630.40, 21,569.52 and 8,556.40

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Solution

The fourth proportional to 15,630.40, 21,569.52 and 8,556.40 is: 11,807.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,630.40 : 21,569.52 = 8,556.40 : x
  2. Step 2: Convert to fraction form
    15,630.40/21,569.52 = 8,556.40/x
  3. Step 3: Cross multiply
    15,630.40x = 21,569.52 × 8,556.40
  4. Step 4: Simplify right side
    15,630.40x = 184,557,440.93
  5. Step 5: Solve for x
    x = 184,557,440.93/15,630.40
  6. Step 6: Final answer
    x = 11,807.60

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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.