Home / 15,386.14-21,232.89-8,312.57

Finding the Fourth Proportional to 15,386.14, 21,232.89 and 8,312.57

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Solution

The fourth proportional to 15,386.14, 21,232.89 and 8,312.57 is: 11,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.14 : 21,232.89 = 8,312.57 : x
  2. Step 2: Convert to fraction form
    15,386.14/21,232.89 = 8,312.57/x
  3. Step 3: Cross multiply
    15,386.14x = 21,232.89 × 8,312.57
  4. Step 4: Simplify right side
    15,386.14x = 176,499,857.89
  5. Step 5: Solve for x
    x = 176,499,857.89/15,386.14
  6. Step 6: Final answer
    x = 11,471.35

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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.