Home / 20,931.65-31,397.71-6,140.85

Finding the Fourth Proportional to 20,931.65, 31,397.71 and 6,140.85

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Solution

The fourth proportional to 20,931.65, 31,397.71 and 6,140.85 is: 9,211.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.65 : 31,397.71 = 6,140.85 : x
  2. Step 2: Convert to fraction form
    20,931.65/31,397.71 = 6,140.85/x
  3. Step 3: Cross multiply
    20,931.65x = 31,397.71 × 6,140.85
  4. Step 4: Simplify right side
    20,931.65x = 192,808,627.45
  5. Step 5: Solve for x
    x = 192,808,627.45/20,931.65
  6. Step 6: Final answer
    x = 9,211.35

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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.