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Finding the Fourth Proportional to 38,426.50, 53,028.57 and 20,762.50

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Solution

The fourth proportional to 38,426.50, 53,028.57 and 20,762.50 is: 28,652.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,426.50 : 53,028.57 = 20,762.50 : x
  2. Step 2: Convert to fraction form
    38,426.50/53,028.57 = 20,762.50/x
  3. Step 3: Cross multiply
    38,426.50x = 53,028.57 × 20,762.50
  4. Step 4: Simplify right side
    38,426.50x = 1,101,005,684.63
  5. Step 5: Solve for x
    x = 1,101,005,684.63/38,426.50
  6. Step 6: Final answer
    x = 28,652.25

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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.