Home / 22,987.65-31,719.70-12,915.60

Finding the Fourth Proportional to 22,987.65, 31,719.70 and 12,915.60

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Solution

The fourth proportional to 22,987.65, 31,719.70 and 12,915.60 is: 17,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,987.65 : 31,719.70 = 12,915.60 : x
  2. Step 2: Convert to fraction form
    22,987.65/31,719.70 = 12,915.60/x
  3. Step 3: Cross multiply
    22,987.65x = 31,719.70 × 12,915.60
  4. Step 4: Simplify right side
    22,987.65x = 409,679,032.94
  5. Step 5: Solve for x
    x = 409,679,032.94/22,987.65
  6. Step 6: Final answer
    x = 17,821.70

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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.