Home / 15,376.19-21,219.23-8,661.91

Finding the Fourth Proportional to 15,376.19, 21,219.23 and 8,661.91

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Solution

The fourth proportional to 15,376.19, 21,219.23 and 8,661.91 is: 11,953.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,376.19 : 21,219.23 = 8,661.91 : x
  2. Step 2: Convert to fraction form
    15,376.19/21,219.23 = 8,661.91/x
  3. Step 3: Cross multiply
    15,376.19x = 21,219.23 × 8,661.91
  4. Step 4: Simplify right side
    15,376.19x = 183,799,060.53
  5. Step 5: Solve for x
    x = 183,799,060.53/15,376.19
  6. Step 6: Final answer
    x = 11,953.49

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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.