Home / 9,213.79-12,720.30-6,075.45

Finding the Fourth Proportional to 9,213.79, 12,720.30 and 6,075.45

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Solution

The fourth proportional to 9,213.79, 12,720.30 and 6,075.45 is: 8,387.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,213.79 : 12,720.30 = 6,075.45 : x
  2. Step 2: Convert to fraction form
    9,213.79/12,720.30 = 6,075.45/x
  3. Step 3: Cross multiply
    9,213.79x = 12,720.30 × 6,075.45
  4. Step 4: Simplify right side
    9,213.79x = 77,281,546.64
  5. Step 5: Solve for x
    x = 77,281,546.64/9,213.79
  6. Step 6: Final answer
    x = 8,387.60

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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.