Home / 42,971.70-64,457.55-13,391.91

Finding the Fourth Proportional to 42,971.70, 64,457.55 and 13,391.91

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Solution

The fourth proportional to 42,971.70, 64,457.55 and 13,391.91 is: 20,087.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,971.70 : 64,457.55 = 13,391.91 : x
  2. Step 2: Convert to fraction form
    42,971.70/64,457.55 = 13,391.91/x
  3. Step 3: Cross multiply
    42,971.70x = 64,457.55 × 13,391.91
  4. Step 4: Simplify right side
    42,971.70x = 863,209,708.42
  5. Step 5: Solve for x
    x = 863,209,708.42/42,971.70
  6. Step 6: Final answer
    x = 20,087.87

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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.