Home / 15,745.79-21,722.18-10,639.67

Finding the Fourth Proportional to 15,745.79, 21,722.18 and 10,639.67

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Solution

The fourth proportional to 15,745.79, 21,722.18 and 10,639.67 is: 14,678.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,745.79 : 21,722.18 = 10,639.67 : x
  2. Step 2: Convert to fraction form
    15,745.79/21,722.18 = 10,639.67/x
  3. Step 3: Cross multiply
    15,745.79x = 21,722.18 × 10,639.67
  4. Step 4: Simplify right side
    15,745.79x = 231,116,787.26
  5. Step 5: Solve for x
    x = 231,116,787.26/15,745.79
  6. Step 6: Final answer
    x = 14,678.00

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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.