Home / 9,111.87-12,528.95-7,783.20

Finding the Fourth Proportional to 9,111.87, 12,528.95 and 7,783.20

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Solution

The fourth proportional to 9,111.87, 12,528.95 and 7,783.20 is: 10,702.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,111.87 : 12,528.95 = 7,783.20 : x
  2. Step 2: Convert to fraction form
    9,111.87/12,528.95 = 7,783.20/x
  3. Step 3: Cross multiply
    9,111.87x = 12,528.95 × 7,783.20
  4. Step 4: Simplify right side
    9,111.87x = 97,515,284.72
  5. Step 5: Solve for x
    x = 97,515,284.72/9,111.87
  6. Step 6: Final answer
    x = 10,702.01

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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.