Home / 12,478,580.20-18,717,870.30-7,439,732.20

Finding the Fourth Proportional to 12,478,580.20, 18,717,870.30 and 7,439,732.20

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Solution

The fourth proportional to 12,478,580.20, 18,717,870.30 and 7,439,732.20 is: 11,159,598.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478,580.20 : 18,717,870.30 = 7,439,732.20 : x
  2. Step 2: Convert to fraction form
    12,478,580.20/18,717,870.30 = 7,439,732.20/x
  3. Step 3: Cross multiply
    12,478,580.20x = 18,717,870.30 × 7,439,732.20
  4. Step 4: Simplify right side
    12,478,580.20x = 139,255,942,386,333.67
  5. Step 5: Solve for x
    x = 139,255,942,386,333.67/12,478,580.20
  6. Step 6: Final answer
    x = 11,159,598.30

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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.