Home / 15,485.81-21,368.85-8,770.10

Finding the Fourth Proportional to 15,485.81, 21,368.85 and 8,770.10

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Solution

The fourth proportional to 15,485.81, 21,368.85 and 8,770.10 is: 12,101.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.81 : 21,368.85 = 8,770.10 : x
  2. Step 2: Convert to fraction form
    15,485.81/21,368.85 = 8,770.10/x
  3. Step 3: Cross multiply
    15,485.81x = 21,368.85 × 8,770.10
  4. Step 4: Simplify right side
    15,485.81x = 187,406,951.39
  5. Step 5: Solve for x
    x = 187,406,951.39/15,485.81
  6. Step 6: Final answer
    x = 12,101.85

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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.