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Finding the Fourth Proportional to 19,875, 27,426.51 and 11,915.67

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Solution

The fourth proportional to 19,875, 27,426.51 and 11,915.67 is: 16,443.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,875 : 27,426.51 = 11,915.67 : x
  2. Step 2: Convert to fraction form
    19,875/27,426.51 = 11,915.67/x
  3. Step 3: Cross multiply
    19,875x = 27,426.51 × 11,915.67
  4. Step 4: Simplify right side
    19,875x = 326,805,242.41
  5. Step 5: Solve for x
    x = 326,805,242.41/19,875
  6. Step 6: Final answer
    x = 16,443.03

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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.