Home / 15,341.06-21,170.64-8,972.04

Finding the Fourth Proportional to 15,341.06, 21,170.64 and 8,972.04

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Solution

The fourth proportional to 15,341.06, 21,170.64 and 8,972.04 is: 12,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,341.06 : 21,170.64 = 8,972.04 : x
  2. Step 2: Convert to fraction form
    15,341.06/21,170.64 = 8,972.04/x
  3. Step 3: Cross multiply
    15,341.06x = 21,170.64 × 8,972.04
  4. Step 4: Simplify right side
    15,341.06x = 189,943,828.91
  5. Step 5: Solve for x
    x = 189,943,828.91/15,341.06
  6. Step 6: Final answer
    x = 12,381.40

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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.