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Finding the Fourth Proportional to 28,365.70, 42,548.55 and 21,804.70

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Solution

The fourth proportional to 28,365.70, 42,548.55 and 21,804.70 is: 32,707.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.70 : 42,548.55 = 21,804.70 : x
  2. Step 2: Convert to fraction form
    28,365.70/42,548.55 = 21,804.70/x
  3. Step 3: Cross multiply
    28,365.70x = 42,548.55 × 21,804.70
  4. Step 4: Simplify right side
    28,365.70x = 927,758,368.19
  5. Step 5: Solve for x
    x = 927,758,368.19/28,365.70
  6. Step 6: Final answer
    x = 32,707.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.