Home / 21,256.32-31,870.80-10,162.76

Finding the Fourth Proportional to 21,256.32, 31,870.80 and 10,162.76

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Solution

The fourth proportional to 21,256.32, 31,870.80 and 10,162.76 is: 15,237.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.32 : 31,870.80 = 10,162.76 : x
  2. Step 2: Convert to fraction form
    21,256.32/31,870.80 = 10,162.76/x
  3. Step 3: Cross multiply
    21,256.32x = 31,870.80 × 10,162.76
  4. Step 4: Simplify right side
    21,256.32x = 323,895,237.14
  5. Step 5: Solve for x
    x = 323,895,237.14/21,256.32
  6. Step 6: Final answer
    x = 15,237.60

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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.