Home / 28,315.84-39,074.88-15,740.32

Finding the Fourth Proportional to 28,315.84, 39,074.88 and 15,740.32

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Solution

The fourth proportional to 28,315.84, 39,074.88 and 15,740.32 is: 21,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.84 : 39,074.88 = 15,740.32 : x
  2. Step 2: Convert to fraction form
    28,315.84/39,074.88 = 15,740.32/x
  3. Step 3: Cross multiply
    28,315.84x = 39,074.88 × 15,740.32
  4. Step 4: Simplify right side
    28,315.84x = 615,051,115.16
  5. Step 5: Solve for x
    x = 615,051,115.16/28,315.84
  6. Step 6: Final answer
    x = 21,721.10

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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.