Home / 42,778.05-64,113.61-20,585.46

Finding the Fourth Proportional to 42,778.05, 64,113.61 and 20,585.46

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Solution

The fourth proportional to 42,778.05, 64,113.61 and 20,585.46 is: 30,852.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,778.05 : 64,113.61 = 20,585.46 : x
  2. Step 2: Convert to fraction form
    42,778.05/64,113.61 = 20,585.46/x
  3. Step 3: Cross multiply
    42,778.05x = 64,113.61 × 20,585.46
  4. Step 4: Simplify right side
    42,778.05x = 1,319,808,154.11
  5. Step 5: Solve for x
    x = 1,319,808,154.11/42,778.05
  6. Step 6: Final answer
    x = 30,852.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.