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Finding the Fourth Proportional to 12,672,904.80, 19,009,357.20 and 12,225,007.20

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Solution

The fourth proportional to 12,672,904.80, 19,009,357.20 and 12,225,007.20 is: 18,337,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672,904.80 : 19,009,357.20 = 12,225,007.20 : x
  2. Step 2: Convert to fraction form
    12,672,904.80/19,009,357.20 = 12,225,007.20/x
  3. Step 3: Cross multiply
    12,672,904.80x = 19,009,357.20 × 12,225,007.20
  4. Step 4: Simplify right side
    12,672,904.80x = 232,389,528,637,371.81
  5. Step 5: Solve for x
    x = 232,389,528,637,371.81/12,672,904.80
  6. Step 6: Final answer
    x = 18,337,510.80

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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.