Home / 10,931.95-15,080.74-7,153.44

Finding the Fourth Proportional to 10,931.95, 15,080.74 and 7,153.44

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Solution

The fourth proportional to 10,931.95, 15,080.74 and 7,153.44 is: 9,868.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.95 : 15,080.74 = 7,153.44 : x
  2. Step 2: Convert to fraction form
    10,931.95/15,080.74 = 7,153.44/x
  3. Step 3: Cross multiply
    10,931.95x = 15,080.74 × 7,153.44
  4. Step 4: Simplify right side
    10,931.95x = 107,879,168.75
  5. Step 5: Solve for x
    x = 107,879,168.75/10,931.95
  6. Step 6: Final answer
    x = 9,868.25

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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.