Home / 15,822.81-21,827.88-9,108.72

Finding the Fourth Proportional to 15,822.81, 21,827.88 and 9,108.72

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Solution

The fourth proportional to 15,822.81, 21,827.88 and 9,108.72 is: 12,565.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,822.81 : 21,827.88 = 9,108.72 : x
  2. Step 2: Convert to fraction form
    15,822.81/21,827.88 = 9,108.72/x
  3. Step 3: Cross multiply
    15,822.81x = 21,827.88 × 9,108.72
  4. Step 4: Simplify right side
    15,822.81x = 198,824,047.11
  5. Step 5: Solve for x
    x = 198,824,047.11/15,822.81
  6. Step 6: Final answer
    x = 12,565.66

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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.