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Finding the Fourth Proportional to 28,415.81, 42,624.52 and 8,693.93

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Solution

The fourth proportional to 28,415.81, 42,624.52 and 8,693.93 is: 13,041.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.81 : 42,624.52 = 8,693.93 : x
  2. Step 2: Convert to fraction form
    28,415.81/42,624.52 = 8,693.93/x
  3. Step 3: Cross multiply
    28,415.81x = 42,624.52 × 8,693.93
  4. Step 4: Simplify right side
    28,415.81x = 370,574,358.31
  5. Step 5: Solve for x
    x = 370,574,358.31/28,415.81
  6. Step 6: Final answer
    x = 13,041.14

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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.