Home / 20,440.21-28,207.75-12,373.76

Finding the Fourth Proportional to 20,440.21, 28,207.75 and 12,373.76

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Solution

The fourth proportional to 20,440.21, 28,207.75 and 12,373.76 is: 17,075.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.21 : 28,207.75 = 12,373.76 : x
  2. Step 2: Convert to fraction form
    20,440.21/28,207.75 = 12,373.76/x
  3. Step 3: Cross multiply
    20,440.21x = 28,207.75 × 12,373.76
  4. Step 4: Simplify right side
    20,440.21x = 349,035,928.64
  5. Step 5: Solve for x
    x = 349,035,928.64/20,440.21
  6. Step 6: Final answer
    x = 17,075.95

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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.