Home / 18,955.84-28,421.60-7,870.18

Finding the Fourth Proportional to 18,955.84, 28,421.60 and 7,870.18

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Solution

The fourth proportional to 18,955.84, 28,421.60 and 7,870.18 is: 11,800.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.84 : 28,421.60 = 7,870.18 : x
  2. Step 2: Convert to fraction form
    18,955.84/28,421.60 = 7,870.18/x
  3. Step 3: Cross multiply
    18,955.84x = 28,421.60 × 7,870.18
  4. Step 4: Simplify right side
    18,955.84x = 223,683,169.10
  5. Step 5: Solve for x
    x = 223,683,169.10/18,955.84
  6. Step 6: Final answer
    x = 11,800.22

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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.