Home / 15,639.91-21,583.43-8,925.40

Finding the Fourth Proportional to 15,639.91, 21,583.43 and 8,925.40

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Solution

The fourth proportional to 15,639.91, 21,583.43 and 8,925.40 is: 12,317.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,639.91 : 21,583.43 = 8,925.40 : x
  2. Step 2: Convert to fraction form
    15,639.91/21,583.43 = 8,925.40/x
  3. Step 3: Cross multiply
    15,639.91x = 21,583.43 × 8,925.40
  4. Step 4: Simplify right side
    15,639.91x = 192,640,746.12
  5. Step 5: Solve for x
    x = 192,640,746.12/15,639.91
  6. Step 6: Final answer
    x = 12,317.25

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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.