Home / 28,517.36-42,776-12,718.32

Finding the Fourth Proportional to 28,517.36, 42,776 and 12,718.32

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Solution

The fourth proportional to 28,517.36, 42,776 and 12,718.32 is: 19,077.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,517.36 : 42,776 = 12,718.32 : x
  2. Step 2: Convert to fraction form
    28,517.36/42,776 = 12,718.32/x
  3. Step 3: Cross multiply
    28,517.36x = 42,776 × 12,718.32
  4. Step 4: Simplify right side
    28,517.36x = 544,038,856.32
  5. Step 5: Solve for x
    x = 544,038,856.32/28,517.36
  6. Step 6: Final answer
    x = 19,077.46

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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.