Home / 28,205.95-38,924.13-15,630.70

Finding the Fourth Proportional to 28,205.95, 38,924.13 and 15,630.70

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Solution

The fourth proportional to 28,205.95, 38,924.13 and 15,630.70 is: 21,570.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.95 : 38,924.13 = 15,630.70 : x
  2. Step 2: Convert to fraction form
    28,205.95/38,924.13 = 15,630.70/x
  3. Step 3: Cross multiply
    28,205.95x = 38,924.13 × 15,630.70
  4. Step 4: Simplify right side
    28,205.95x = 608,411,398.79
  5. Step 5: Solve for x
    x = 608,411,398.79/28,205.95
  6. Step 6: Final answer
    x = 21,570.32

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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.