Home / 18,970.81-28,459.30-7,125.50

Finding the Fourth Proportional to 18,970.81, 28,459.30 and 7,125.50

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Solution

The fourth proportional to 18,970.81, 28,459.30 and 7,125.50 is: 10,689.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.81 : 28,459.30 = 7,125.50 : x
  2. Step 2: Convert to fraction form
    18,970.81/28,459.30 = 7,125.50/x
  3. Step 3: Cross multiply
    18,970.81x = 28,459.30 × 7,125.50
  4. Step 4: Simplify right side
    18,970.81x = 202,786,795.48
  5. Step 5: Solve for x
    x = 202,786,795.48/18,970.81
  6. Step 6: Final answer
    x = 10,689.41

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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.