Home / 28,318.77-42,478.11-12,718.17

Finding the Fourth Proportional to 28,318.77, 42,478.11 and 12,718.17

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Solution

The fourth proportional to 28,318.77, 42,478.11 and 12,718.17 is: 19,077.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.77 : 42,478.11 = 12,718.17 : x
  2. Step 2: Convert to fraction form
    28,318.77/42,478.11 = 12,718.17/x
  3. Step 3: Cross multiply
    28,318.77x = 42,478.11 × 12,718.17
  4. Step 4: Simplify right side
    28,318.77x = 540,243,824.26
  5. Step 5: Solve for x
    x = 540,243,824.26/28,318.77
  6. Step 6: Final answer
    x = 19,077.23

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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.