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Finding the Fourth Proportional to 51,291.52, 70,782.11 and 28,630.31

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Solution

The fourth proportional to 51,291.52, 70,782.11 and 28,630.31 is: 39,509.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,291.52 : 70,782.11 = 28,630.31 : x
  2. Step 2: Convert to fraction form
    51,291.52/70,782.11 = 28,630.31/x
  3. Step 3: Cross multiply
    51,291.52x = 70,782.11 × 28,630.31
  4. Step 4: Simplify right side
    51,291.52x = 2,026,513,878.76
  5. Step 5: Solve for x
    x = 2,026,513,878.76/51,291.52
  6. Step 6: Final answer
    x = 39,509.73

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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.