Home / 21,120.95-31,639.06-10,038.33

Finding the Fourth Proportional to 21,120.95, 31,639.06 and 10,038.33

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Solution

The fourth proportional to 21,120.95, 31,639.06 and 10,038.33 is: 15,037.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.95 : 31,639.06 = 10,038.33 : x
  2. Step 2: Convert to fraction form
    21,120.95/31,639.06 = 10,038.33/x
  3. Step 3: Cross multiply
    21,120.95x = 31,639.06 × 10,038.33
  4. Step 4: Simplify right side
    21,120.95x = 317,603,281.25
  5. Step 5: Solve for x
    x = 317,603,281.25/21,120.95
  6. Step 6: Final answer
    x = 15,037.36

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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.