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Finding the Fourth Proportional to 28,641.60, 39,539.52 and 18,047.52

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Solution

The fourth proportional to 28,641.60, 39,539.52 and 18,047.52 is: 24,914.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,641.60 : 39,539.52 = 18,047.52 : x
  2. Step 2: Convert to fraction form
    28,641.60/39,539.52 = 18,047.52/x
  3. Step 3: Cross multiply
    28,641.60x = 39,539.52 × 18,047.52
  4. Step 4: Simplify right side
    28,641.60x = 713,590,277.99
  5. Step 5: Solve for x
    x = 713,590,277.99/28,641.60
  6. Step 6: Final answer
    x = 24,914.47

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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.