Home / 8,478.81-11,706.59-6,485.90

Finding the Fourth Proportional to 8,478.81, 11,706.59 and 6,485.90

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Solution

The fourth proportional to 8,478.81, 11,706.59 and 6,485.90 is: 8,955.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.81 : 11,706.59 = 6,485.90 : x
  2. Step 2: Convert to fraction form
    8,478.81/11,706.59 = 6,485.90/x
  3. Step 3: Cross multiply
    8,478.81x = 11,706.59 × 6,485.90
  4. Step 4: Simplify right side
    8,478.81x = 75,927,729.76
  5. Step 5: Solve for x
    x = 75,927,729.76/8,478.81
  6. Step 6: Final answer
    x = 8,955.00

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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.