Home / 21,111,802.40-31,630,378.80-18,723,015.20

Finding the Fourth Proportional to 21,111,802.40, 31,630,378.80 and 18,723,015.20

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Solution

The fourth proportional to 21,111,802.40, 31,630,378.80 and 18,723,015.20 is: 28,051,421.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111,802.40 : 31,630,378.80 = 18,723,015.20 : x
  2. Step 2: Convert to fraction form
    21,111,802.40/31,630,378.80 = 18,723,015.20/x
  3. Step 3: Cross multiply
    21,111,802.40x = 31,630,378.80 × 18,723,015.20
  4. Step 4: Simplify right side
    21,111,802.40x = 592,216,063,054,157.75
  5. Step 5: Solve for x
    x = 592,216,063,054,157.75/21,111,802.40
  6. Step 6: Final answer
    x = 28,051,421.28

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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.