Home / 10,010.40-14,938.80-7,807.20

Finding the Fourth Proportional to 10,010.40, 14,938.80 and 7,807.20

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Solution

The fourth proportional to 10,010.40, 14,938.80 and 7,807.20 is: 11,650.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,010.40 : 14,938.80 = 7,807.20 : x
  2. Step 2: Convert to fraction form
    10,010.40/14,938.80 = 7,807.20/x
  3. Step 3: Cross multiply
    10,010.40x = 14,938.80 × 7,807.20
  4. Step 4: Simplify right side
    10,010.40x = 116,630,199.36
  5. Step 5: Solve for x
    x = 116,630,199.36/10,010.40
  6. Step 6: Final answer
    x = 11,650.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.