Home / 21,719.36-32,584.80-7,870.40

Finding the Fourth Proportional to 21,719.36, 32,584.80 and 7,870.40

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Solution

The fourth proportional to 21,719.36, 32,584.80 and 7,870.40 is: 11,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,719.36 : 32,584.80 = 7,870.40 : x
  2. Step 2: Convert to fraction form
    21,719.36/32,584.80 = 7,870.40/x
  3. Step 3: Cross multiply
    21,719.36x = 32,584.80 × 7,870.40
  4. Step 4: Simplify right side
    21,719.36x = 256,455,409.92
  5. Step 5: Solve for x
    x = 256,455,409.92/21,719.36
  6. Step 6: Final answer
    x = 11,807.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.