Home / 9,285.12-12,812.80-5,306.40

Finding the Fourth Proportional to 9,285.12, 12,812.80 and 5,306.40

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Solution

The fourth proportional to 9,285.12, 12,812.80 and 5,306.40 is: 7,322.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,285.12 : 12,812.80 = 5,306.40 : x
  2. Step 2: Convert to fraction form
    9,285.12/12,812.80 = 5,306.40/x
  3. Step 3: Cross multiply
    9,285.12x = 12,812.80 × 5,306.40
  4. Step 4: Simplify right side
    9,285.12x = 67,989,841.92
  5. Step 5: Solve for x
    x = 67,989,841.92/9,285.12
  6. Step 6: Final answer
    x = 7,322.45

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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.