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Finding the Fourth Proportional to 28,361.06, 42,547.74 and 8,639.10

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Solution

The fourth proportional to 28,361.06, 42,547.74 and 8,639.10 is: 12,960.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.06 : 42,547.74 = 8,639.10 : x
  2. Step 2: Convert to fraction form
    28,361.06/42,547.74 = 8,639.10/x
  3. Step 3: Cross multiply
    28,361.06x = 42,547.74 × 8,639.10
  4. Step 4: Simplify right side
    28,361.06x = 367,574,180.63
  5. Step 5: Solve for x
    x = 367,574,180.63/28,361.06
  6. Step 6: Final answer
    x = 12,960.52

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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.