Home / 15,880.64-21,915.70-8,710.87

Finding the Fourth Proportional to 15,880.64, 21,915.70 and 8,710.87

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Solution

The fourth proportional to 15,880.64, 21,915.70 and 8,710.87 is: 12,021.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.64 : 21,915.70 = 8,710.87 : x
  2. Step 2: Convert to fraction form
    15,880.64/21,915.70 = 8,710.87/x
  3. Step 3: Cross multiply
    15,880.64x = 21,915.70 × 8,710.87
  4. Step 4: Simplify right side
    15,880.64x = 190,904,698.17
  5. Step 5: Solve for x
    x = 190,904,698.17/15,880.64
  6. Step 6: Final answer
    x = 12,021.22

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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.