Home / 21,488.16-29,661.12-12,995.04

Finding the Fourth Proportional to 21,488.16, 29,661.12 and 12,995.04

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Solution

The fourth proportional to 21,488.16, 29,661.12 and 12,995.04 is: 17,937.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,488.16 : 29,661.12 = 12,995.04 : x
  2. Step 2: Convert to fraction form
    21,488.16/29,661.12 = 12,995.04/x
  3. Step 3: Cross multiply
    21,488.16x = 29,661.12 × 12,995.04
  4. Step 4: Simplify right side
    21,488.16x = 385,447,440.84
  5. Step 5: Solve for x
    x = 385,447,440.84/21,488.16
  6. Step 6: Final answer
    x = 17,937.67

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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.