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Finding the Fourth Proportional to 12,487.76, 18,740.85 and 5,913.93

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Solution

The fourth proportional to 12,487.76, 18,740.85 and 5,913.93 is: 8,875.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.76 : 18,740.85 = 5,913.93 : x
  2. Step 2: Convert to fraction form
    12,487.76/18,740.85 = 5,913.93/x
  3. Step 3: Cross multiply
    12,487.76x = 18,740.85 × 5,913.93
  4. Step 4: Simplify right side
    12,487.76x = 110,832,075.04
  5. Step 5: Solve for x
    x = 110,832,075.04/12,487.76
  6. Step 6: Final answer
    x = 8,875.26

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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.