Home / 21,152.30-29,130.99-20,693.12

Finding the Fourth Proportional to 21,152.30, 29,130.99 and 20,693.12

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Solution

The fourth proportional to 21,152.30, 29,130.99 and 20,693.12 is: 28,498.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,152.30 : 29,130.99 = 20,693.12 : x
  2. Step 2: Convert to fraction form
    21,152.30/29,130.99 = 20,693.12/x
  3. Step 3: Cross multiply
    21,152.30x = 29,130.99 × 20,693.12
  4. Step 4: Simplify right side
    21,152.30x = 602,811,071.79
  5. Step 5: Solve for x
    x = 602,811,071.79/21,152.30
  6. Step 6: Final answer
    x = 28,498.61

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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.