Home / 15,689.79-21,653.37-8,617.32

Finding the Fourth Proportional to 15,689.79, 21,653.37 and 8,617.32

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Solution

The fourth proportional to 15,689.79, 21,653.37 and 8,617.32 is: 11,892.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.79 : 21,653.37 = 8,617.32 : x
  2. Step 2: Convert to fraction form
    15,689.79/21,653.37 = 8,617.32/x
  3. Step 3: Cross multiply
    15,689.79x = 21,653.37 × 8,617.32
  4. Step 4: Simplify right side
    15,689.79x = 186,594,018.37
  5. Step 5: Solve for x
    x = 186,594,018.37/15,689.79
  6. Step 6: Final answer
    x = 11,892.70

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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.