Home / 10,938.40-16,407.60-7,047.20

Finding the Fourth Proportional to 10,938.40, 16,407.60 and 7,047.20

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Solution

The fourth proportional to 10,938.40, 16,407.60 and 7,047.20 is: 10,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,938.40 : 16,407.60 = 7,047.20 : x
  2. Step 2: Convert to fraction form
    10,938.40/16,407.60 = 7,047.20/x
  3. Step 3: Cross multiply
    10,938.40x = 16,407.60 × 7,047.20
  4. Step 4: Simplify right side
    10,938.40x = 115,627,638.72
  5. Step 5: Solve for x
    x = 115,627,638.72/10,938.40
  6. Step 6: Final answer
    x = 10,570.80

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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.