Home / 28,754.68-39,678.66-21,205.12

Finding the Fourth Proportional to 28,754.68, 39,678.66 and 21,205.12

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Solution

The fourth proportional to 28,754.68, 39,678.66 and 21,205.12 is: 29,261.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,754.68 : 39,678.66 = 21,205.12 : x
  2. Step 2: Convert to fraction form
    28,754.68/39,678.66 = 21,205.12/x
  3. Step 3: Cross multiply
    28,754.68x = 39,678.66 × 21,205.12
  4. Step 4: Simplify right side
    28,754.68x = 841,390,746.74
  5. Step 5: Solve for x
    x = 841,390,746.74/28,754.68
  6. Step 6: Final answer
    x = 29,261.00

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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.