Home / 10,421.40-14,381.88-5,705.67

Finding the Fourth Proportional to 10,421.40, 14,381.88 and 5,705.67

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Solution

The fourth proportional to 10,421.40, 14,381.88 and 5,705.67 is: 7,874.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.40 : 14,381.88 = 5,705.67 : x
  2. Step 2: Convert to fraction form
    10,421.40/14,381.88 = 5,705.67/x
  3. Step 3: Cross multiply
    10,421.40x = 14,381.88 × 5,705.67
  4. Step 4: Simplify right side
    10,421.40x = 82,058,261.26
  5. Step 5: Solve for x
    x = 82,058,261.26/10,421.40
  6. Step 6: Final answer
    x = 7,874.02

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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.