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Finding the Fourth Proportional to 8,957.34, 12,361.14 and 4,978.49

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Solution

The fourth proportional to 8,957.34, 12,361.14 and 4,978.49 is: 6,870.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.34 : 12,361.14 = 4,978.49 : x
  2. Step 2: Convert to fraction form
    8,957.34/12,361.14 = 4,978.49/x
  3. Step 3: Cross multiply
    8,957.34x = 12,361.14 × 4,978.49
  4. Step 4: Simplify right side
    8,957.34x = 61,539,750.07
  5. Step 5: Solve for x
    x = 61,539,750.07/8,957.34
  6. Step 6: Final answer
    x = 6,870.32

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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.