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Finding the Fourth Proportional to 51,312.71, 70,810.80 and 28,652.05

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Solution

The fourth proportional to 51,312.71, 70,810.80 and 28,652.05 is: 39,539.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,312.71 : 70,810.80 = 28,652.05 : x
  2. Step 2: Convert to fraction form
    51,312.71/70,810.80 = 28,652.05/x
  3. Step 3: Cross multiply
    51,312.71x = 70,810.80 × 28,652.05
  4. Step 4: Simplify right side
    51,312.71x = 2,028,874,582.14
  5. Step 5: Solve for x
    x = 2,028,874,582.14/51,312.71
  6. Step 6: Final answer
    x = 39,539.42

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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.