Home / 20,570.34-28,390.11-12,077.15

Finding the Fourth Proportional to 20,570.34, 28,390.11 and 12,077.15

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Solution

The fourth proportional to 20,570.34, 28,390.11 and 12,077.15 is: 16,668.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,570.34 : 28,390.11 = 12,077.15 : x
  2. Step 2: Convert to fraction form
    20,570.34/28,390.11 = 12,077.15/x
  3. Step 3: Cross multiply
    20,570.34x = 28,390.11 × 12,077.15
  4. Step 4: Simplify right side
    20,570.34x = 342,871,475.04
  5. Step 5: Solve for x
    x = 342,871,475.04/20,570.34
  6. Step 6: Final answer
    x = 16,668.25

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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.