Home / 21,211.41-31,807.08-7,875.21

Finding the Fourth Proportional to 21,211.41, 31,807.08 and 7,875.21

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Solution

The fourth proportional to 21,211.41, 31,807.08 and 7,875.21 is: 11,809.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.41 : 31,807.08 = 7,875.21 : x
  2. Step 2: Convert to fraction form
    21,211.41/31,807.08 = 7,875.21/x
  3. Step 3: Cross multiply
    21,211.41x = 31,807.08 × 7,875.21
  4. Step 4: Simplify right side
    21,211.41x = 250,487,434.49
  5. Step 5: Solve for x
    x = 250,487,434.49/21,211.41
  6. Step 6: Final answer
    x = 11,809.09

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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.