Home / 21,260.86-29,302.88-15,583.57

Finding the Fourth Proportional to 21,260.86, 29,302.88 and 15,583.57

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Solution

The fourth proportional to 21,260.86, 29,302.88 and 15,583.57 is: 21,478.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.86 : 29,302.88 = 15,583.57 : x
  2. Step 2: Convert to fraction form
    21,260.86/29,302.88 = 15,583.57/x
  3. Step 3: Cross multiply
    21,260.86x = 29,302.88 × 15,583.57
  4. Step 4: Simplify right side
    21,260.86x = 456,643,330.51
  5. Step 5: Solve for x
    x = 456,643,330.51/21,260.86
  6. Step 6: Final answer
    x = 21,478.12

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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.