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Finding the Fourth Proportional to 51,347.64, 70,860.78 and 28,987.32

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Solution

The fourth proportional to 51,347.64, 70,860.78 and 28,987.32 is: 40,003.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,347.64 : 70,860.78 = 28,987.32 : x
  2. Step 2: Convert to fraction form
    51,347.64/70,860.78 = 28,987.32/x
  3. Step 3: Cross multiply
    51,347.64x = 70,860.78 × 28,987.32
  4. Step 4: Simplify right side
    51,347.64x = 2,054,064,105.31
  5. Step 5: Solve for x
    x = 2,054,064,105.31/51,347.64
  6. Step 6: Final answer
    x = 40,003.09

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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.