Home / 21,112,002.40-31,630,678.80-18,723,215.20

Finding the Fourth Proportional to 21,112,002.40, 31,630,678.80 and 18,723,215.20

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Solution

The fourth proportional to 21,112,002.40, 31,630,678.80 and 18,723,215.20 is: 28,051,721.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112,002.40 : 31,630,678.80 = 18,723,215.20 : x
  2. Step 2: Convert to fraction form
    21,112,002.40/31,630,678.80 = 18,723,215.20/x
  3. Step 3: Cross multiply
    21,112,002.40x = 31,630,678.80 × 18,723,215.20
  4. Step 4: Simplify right side
    21,112,002.40x = 592,228,006,094,477.75
  5. Step 5: Solve for x
    x = 592,228,006,094,477.75/21,112,002.40
  6. Step 6: Final answer
    x = 28,051,721.24

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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.