Home / 20,639.52-28,482.96-12,570.40

Finding the Fourth Proportional to 20,639.52, 28,482.96 and 12,570.40

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Solution

The fourth proportional to 20,639.52, 28,482.96 and 12,570.40 is: 17,347.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.52 : 28,482.96 = 12,570.40 : x
  2. Step 2: Convert to fraction form
    20,639.52/28,482.96 = 12,570.40/x
  3. Step 3: Cross multiply
    20,639.52x = 28,482.96 × 12,570.40
  4. Step 4: Simplify right side
    20,639.52x = 358,042,200.38
  5. Step 5: Solve for x
    x = 358,042,200.38/20,639.52
  6. Step 6: Final answer
    x = 17,347.41

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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.