Home / 20,969.41-28,946.87-14,990.71

Finding the Fourth Proportional to 20,969.41, 28,946.87 and 14,990.71

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Solution

The fourth proportional to 20,969.41, 28,946.87 and 14,990.71 is: 20,693.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.41 : 28,946.87 = 14,990.71 : x
  2. Step 2: Convert to fraction form
    20,969.41/28,946.87 = 14,990.71/x
  3. Step 3: Cross multiply
    20,969.41x = 28,946.87 × 14,990.71
  4. Step 4: Simplify right side
    20,969.41x = 433,934,133.58
  5. Step 5: Solve for x
    x = 433,934,133.58/20,969.41
  6. Step 6: Final answer
    x = 20,693.67

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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.