Home / 21,970.73-30,320.12-12,898.67

Finding the Fourth Proportional to 21,970.73, 30,320.12 and 12,898.67

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Solution

The fourth proportional to 21,970.73, 30,320.12 and 12,898.67 is: 17,800.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.73 : 30,320.12 = 12,898.67 : x
  2. Step 2: Convert to fraction form
    21,970.73/30,320.12 = 12,898.67/x
  3. Step 3: Cross multiply
    21,970.73x = 30,320.12 × 12,898.67
  4. Step 4: Simplify right side
    21,970.73x = 391,089,054.52
  5. Step 5: Solve for x
    x = 391,089,054.52/21,970.73
  6. Step 6: Final answer
    x = 17,800.46

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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.