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Finding the Fourth Proportional to 51,011.70, 70,394.45 and 28,041.60

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Solution

The fourth proportional to 51,011.70, 70,394.45 and 28,041.60 is: 38,696.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,011.70 : 70,394.45 = 28,041.60 : x
  2. Step 2: Convert to fraction form
    51,011.70/70,394.45 = 28,041.60/x
  3. Step 3: Cross multiply
    51,011.70x = 70,394.45 × 28,041.60
  4. Step 4: Simplify right side
    51,011.70x = 1,973,973,009.12
  5. Step 5: Solve for x
    x = 1,973,973,009.12/51,011.70
  6. Step 6: Final answer
    x = 38,696.48

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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.