Home / 30,495.07-42,068.19-20,425.69

Finding the Fourth Proportional to 30,495.07, 42,068.19 and 20,425.69

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Solution

The fourth proportional to 30,495.07, 42,068.19 and 20,425.69 is: 28,177.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,495.07 : 42,068.19 = 20,425.69 : x
  2. Step 2: Convert to fraction form
    30,495.07/42,068.19 = 20,425.69/x
  3. Step 3: Cross multiply
    30,495.07x = 42,068.19 × 20,425.69
  4. Step 4: Simplify right side
    30,495.07x = 859,271,807.80
  5. Step 5: Solve for x
    x = 859,271,807.80/30,495.07
  6. Step 6: Final answer
    x = 28,177.40

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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.