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Finding the Fourth Proportional to 51,216.48, 70,666.56 and 28,860.48

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Solution

The fourth proportional to 51,216.48, 70,666.56 and 28,860.48 is: 39,820.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,216.48 : 70,666.56 = 28,860.48 : x
  2. Step 2: Convert to fraction form
    51,216.48/70,666.56 = 28,860.48/x
  3. Step 3: Cross multiply
    51,216.48x = 70,666.56 × 28,860.48
  4. Step 4: Simplify right side
    51,216.48x = 2,039,470,841.55
  5. Step 5: Solve for x
    x = 2,039,470,841.55/51,216.48
  6. Step 6: Final answer
    x = 39,820.60

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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.