Home / 28,989.72-39,988.13-19,166.93

Finding the Fourth Proportional to 28,989.72, 39,988.13 and 19,166.93

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Solution

The fourth proportional to 28,989.72, 39,988.13 and 19,166.93 is: 26,438.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,989.72 : 39,988.13 = 19,166.93 : x
  2. Step 2: Convert to fraction form
    28,989.72/39,988.13 = 19,166.93/x
  3. Step 3: Cross multiply
    28,989.72x = 39,988.13 × 19,166.93
  4. Step 4: Simplify right side
    28,989.72x = 766,449,492.74
  5. Step 5: Solve for x
    x = 766,449,492.74/28,989.72
  6. Step 6: Final answer
    x = 26,438.67

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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.