Home / 21,005,609.40-31,509,399.24-10,210,041.72

Finding the Fourth Proportional to 21,005,609.40, 31,509,399.24 and 10,210,041.72

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Solution

The fourth proportional to 21,005,609.40, 31,509,399.24 and 10,210,041.72 is: 15,315,541.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,609.40 : 31,509,399.24 = 10,210,041.72 : x
  2. Step 2: Convert to fraction form
    21,005,609.40/31,509,399.24 = 10,210,041.72/x
  3. Step 3: Cross multiply
    21,005,609.40x = 31,509,399.24 × 10,210,041.72
  4. Step 4: Simplify right side
    21,005,609.40x = 321,712,280,812,536.31
  5. Step 5: Solve for x
    x = 321,712,280,812,536.31/21,005,609.40
  6. Step 6: Final answer
    x = 15,315,541.42

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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.