Home / 34,239.94-47,256.54-20,815.40

Finding the Fourth Proportional to 34,239.94, 47,256.54 and 20,815.40

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Solution

The fourth proportional to 34,239.94, 47,256.54 and 20,815.40 is: 28,728.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,239.94 : 47,256.54 = 20,815.40 : x
  2. Step 2: Convert to fraction form
    34,239.94/47,256.54 = 20,815.40/x
  3. Step 3: Cross multiply
    34,239.94x = 47,256.54 × 20,815.40
  4. Step 4: Simplify right side
    34,239.94x = 983,663,782.72
  5. Step 5: Solve for x
    x = 983,663,782.72/34,239.94
  6. Step 6: Final answer
    x = 28,728.55

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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.