Home / 22,987.32-31,721.81-12,915.51

Finding the Fourth Proportional to 22,987.32, 31,721.81 and 12,915.51

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Solution

The fourth proportional to 22,987.32, 31,721.81 and 12,915.51 is: 17,823.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,987.32 : 31,721.81 = 12,915.51 : x
  2. Step 2: Convert to fraction form
    22,987.32/31,721.81 = 12,915.51/x
  3. Step 3: Cross multiply
    22,987.32x = 31,721.81 × 12,915.51
  4. Step 4: Simplify right side
    22,987.32x = 409,703,289.70
  5. Step 5: Solve for x
    x = 409,703,289.70/22,987.32
  6. Step 6: Final answer
    x = 17,823.01

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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.