Home / 28,320.69-39,083.54-15,574.40

Finding the Fourth Proportional to 28,320.69, 39,083.54 and 15,574.40

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Solution

The fourth proportional to 28,320.69, 39,083.54 and 15,574.40 is: 21,493.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,320.69 : 39,083.54 = 15,574.40 : x
  2. Step 2: Convert to fraction form
    28,320.69/39,083.54 = 15,574.40/x
  3. Step 3: Cross multiply
    28,320.69x = 39,083.54 × 15,574.40
  4. Step 4: Simplify right side
    28,320.69x = 608,702,528.89
  5. Step 5: Solve for x
    x = 608,702,528.89/28,320.69
  6. Step 6: Final answer
    x = 21,493.21

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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.