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Finding the Fourth Proportional to 28,259.34, 42,384.21 and 7,484.94

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Solution

The fourth proportional to 28,259.34, 42,384.21 and 7,484.94 is: 11,226.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,259.34 : 42,384.21 = 7,484.94 : x
  2. Step 2: Convert to fraction form
    28,259.34/42,384.21 = 7,484.94/x
  3. Step 3: Cross multiply
    28,259.34x = 42,384.21 × 7,484.94
  4. Step 4: Simplify right side
    28,259.34x = 317,243,268.80
  5. Step 5: Solve for x
    x = 317,243,268.80/28,259.34
  6. Step 6: Final answer
    x = 11,226.14

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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.