Home / 20,258.90-27,970.30-12,715.58

Finding the Fourth Proportional to 20,258.90, 27,970.30 and 12,715.58

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Solution

The fourth proportional to 20,258.90, 27,970.30 and 12,715.58 is: 17,555.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.90 : 27,970.30 = 12,715.58 : x
  2. Step 2: Convert to fraction form
    20,258.90/27,970.30 = 12,715.58/x
  3. Step 3: Cross multiply
    20,258.90x = 27,970.30 × 12,715.58
  4. Step 4: Simplify right side
    20,258.90x = 355,658,587.27
  5. Step 5: Solve for x
    x = 355,658,587.27/20,258.90
  6. Step 6: Final answer
    x = 17,555.67

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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.