Home / 21,455.32-29,580.96-13,888.30

Finding the Fourth Proportional to 21,455.32, 29,580.96 and 13,888.30

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Solution

The fourth proportional to 21,455.32, 29,580.96 and 13,888.30 is: 19,148.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,455.32 : 29,580.96 = 13,888.30 : x
  2. Step 2: Convert to fraction form
    21,455.32/29,580.96 = 13,888.30/x
  3. Step 3: Cross multiply
    21,455.32x = 29,580.96 × 13,888.30
  4. Step 4: Simplify right side
    21,455.32x = 410,829,246.77
  5. Step 5: Solve for x
    x = 410,829,246.77/21,455.32
  6. Step 6: Final answer
    x = 19,148.13

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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.